precambrian - Earth Sciences bibliographies - in Harvard style

In-text: (Precambrian time | geochronology, 2014)

Your Bibliography: Encyclopedia Britannica. 2014. Precambrian time | geochronology. [online] Available at: <http://www.britannica.com/EBchecked/topic/474302/Precambrian-time> [Accessed 19 March 2015].

In-text: (Precambrian era Facts, information, pictures | Encyclopedia.com articles about Precambrian era, 2015)

Your Bibliography: Encyclopedia.com. 2015. Precambrian era Facts, information, pictures | Encyclopedia.com articles about Precambrian era. [online] Available at: <http://www.encyclopedia.com/topic/Precambrian_era.aspx> [Accessed 17 March 2015].

In-text: (Precambrian Fossils, 2015)

Your Bibliography: Fossilmuseum.net. 2015. Precambrian Fossils. [online] Available at: <http://www.fossilmuseum.net/Paleobiology/Precambrian-Fossils.htm> [Accessed 22 March 2015].

In-text: (Precambrian Era, 2015)

Your Bibliography: Geo.msu.edu. 2015. Precambrian Era. [online] Available at: <http://geo.msu.edu/extra/geogmich/Precambrian.html> [Accessed 22 March 2015].

In-text: (Precambrian: Facts About the Beginning of Time, 2015)

Your Bibliography: LiveScience.com. 2015. Precambrian: Facts About the Beginning of Time. [online] Available at: <http://www.livescience.com/43354-precambrian-time.html> [Accessed 13 March 2015].

In-text: (Precambrian: Facts About the Beginning of Time, 2015)

Your Bibliography: LiveScience.com. 2015. Precambrian: Facts About the Beginning of Time. [online] Available at: <http://www.livescience.com/43354-precambrian-time.html> [Accessed 22 March 2015].

In-text: (Society, 2015)

Your Bibliography: Society, N., 2015. Precambrian Time, Earth History Information, Prehistoric Facts -- National Geographic. [online] National Geographic. Available at: <http://science.nationalgeographic.com.au/science/prehistoric-world/precambrian/> [Accessed 15 March 2015].

In-text: (The Precambrian Period: Events, Facts & Quiz | Study.com, 2015)

Your Bibliography: Study.com. 2015. The Precambrian Period: Events, Facts & Quiz | Study.com. [online] Available at: <http://study.com/academy/lesson/the-precambrian-period-events-facts-quiz.html> [Accessed 22 March 2015].