Craters - Earth Sciences bibliographies - in Harvard style

In-text: (Beazley, 1980)

Your Bibliography: Beazley, M., 1980. Exploring the Universe. London: Mitchell Beazley Encyclopaedias Limited, p.57.

In-text: (Calhoun, 2013)

Your Bibliography: Calhoun, M., 2013. Impact Craters on the Moon | Education.com. [online] Education.com. Available at: <http://www.education.com/science-fair/article/factors-that-affect-crater-formation/> [Accessed 24 March 2015].

In-text: (Christiansen and Hamblin, 2007)

Your Bibliography: Christiansen, E. and Hamblin, W., 2007. exPlanets Ch04. [online] Explanet.info. Available at: <http://explanet.info/Chapter04.htm> [Accessed 24 March 2015].

In-text: (Kelsey, 2015)

Your Bibliography: Kelsey, A., 2015. What is a Crater? (with pictures). [online] wiseGEEK. Available at: <http://www.wisegeek.com/what-is-a-crater.htm> [Accessed 22 March 2015].

In-text: (Impact Cratering, 2015)

Your Bibliography: Lpi.usra.edu. 2015. Impact Cratering. [online] Available at: <http://www.lpi.usra.edu/education/explore/shaping_the_planets/impact_cratering.shtml> [Accessed 23 March 2015].

In-text: (McDaniel, 2015)

Your Bibliography: McDaniel, M., 2015. crater. [online] Education.nationalgeographic.com. Available at: <http://education.nationalgeographic.com/education/encyclopedia/crater/?ar_a=1> [Accessed 22 March 2015].

In-text: (Geologic Activity - Craters Of The Moon National Monument & Preserve (U.S. National Park Service), 2015)

Your Bibliography: Nps.gov. 2015. Geologic Activity - Craters Of The Moon National Monument & Preserve (U.S. National Park Service). [online] Available at: <http://www.nps.gov/crmo/learn/nature/geologicactivity.htm> [Accessed 22 March 2015].

In-text: (Unique Facts about Mexico: Chicxulub Crater, n.d.)

Your Bibliography: Sheppardsoftware.com. n.d. Unique Facts about Mexico: Chicxulub Crater. [online] Available at: <http://www.sheppardsoftware.com/Mexicoweb/factfile/Unique-facts-Mexico4.htm> [Accessed 24 March 2015].