References - Psychology bibliographies - in Harvard style

In-text: (What is the definition of psychological barriers, 2015)

Your Bibliography: Answers.com. 2015. What is the definition of psychological barriers. [online] Available at: <http://www.answers.com/Q/What_is_the_definition_of_psychological_barriers> [Accessed 2 March 2015].

In-text: (Burke, 2015)

Your Bibliography: Burke, S., 2015. Australian Psychological Society : Understanding the psychological barriers to climate change action. [online] Psychology.org.au. Available at: <http://www.psychology.org.au/publications/inpsych/2010/december/climate/> [Accessed 3 March 2015].

In-text: (International Programs - World Population: 1950-2050 - U.S. Census Bureau, 2015)

Your Bibliography: Census.gov. 2015. International Programs - World Population: 1950-2050 - U.S. Census Bureau. [online] Available at: <http://www.census.gov/population/international/data/idb/worldpopgraph.php> [Accessed 2 March 2015].

In-text: (Deci and Ryan, 2002)

Your Bibliography: Deci, E. and Ryan, R., 2002. Handbook of self-determination research. Rochester, NY: University of Rochester Press.

In-text: (Definitions for renewable energy, 2015)

Your Bibliography: Folkecenter.net. 2015. Definitions for renewable energy. [online] Available at: <http://www.folkecenter.net/gb/overview/definitions/> [Accessed 3 March 2015].

In-text: (Kollmuss and Agyeman, 2002)

Your Bibliography: Kollmuss, A. and Agyeman, J., 2002. Mind the Gap: Why do people act environmentally and what are the barriers to pro-environmental behavior?. Env. Educ. Res., 8(3), pp.239-260.

In-text: (Lorenzoni, Nicholson-Cole and Whitmarsh, 2007)

Your Bibliography: Lorenzoni, I., Nicholson-Cole, S. and Whitmarsh, L., 2007. Barriers perceived to engaging with climate change among the UK public and their policy implications. Global Environmental Change, 17(3-4), pp.445-459.

In-text: (Lucas, Brooks, Darnton and Jones, 2008)

Your Bibliography: Lucas, K., Brooks, M., Darnton, A. and Jones, J., 2008. Promoting pro-environmental behaviour: existing evidence and policy implications. Environmental Science & Policy, 11(5), pp.456-466.

In-text: (Morales, 2012)

Your Bibliography: Morales, L., 2012. U.S. Distrust in Media Hits New High. [online] Gallup.com. Available at: <http://www.gallup.com/poll/157589/distrust-media-hits-new-high.aspx> [Accessed 2 March 2015].

In-text: (Home - selfdeterminationtheory.org, 2015)

Your Bibliography: selfdeterminationtheory.org. 2015. Home - selfdeterminationtheory.org. [online] Available at: <http://www.selfdeterminationtheory.org/> [Accessed 3 March 2015].

In-text: (Smith and Skinner, 1999)

Your Bibliography: Smith, A. and Skinner, A., 1999. The wealth of nations. London: Penguin.

In-text: (psychology, 2015)

Your Bibliography: TheFreeDictionary.com. 2015. psychology. [online] Available at: <http://www.thefreedictionary.com/psychology> [Accessed 2 March 2015].

In-text: (Van Vugt, 2009)

Your Bibliography: Van Vugt, M., 2009. Averting the Tragedy of the Commons. [online] Available at: <http://cdp.sagepub.com/content/18/3/169.full.pdf> [Accessed 2 March 2015].

In-text: (Van Vugt, 2009)

Your Bibliography: Van Vugt, M., 2009. Averting the Tragedy of the Commons: Using Social Psychological Science to Protect the Environment. Current Directions in Psychological Science, 18(3), pp.169-173.