APA-viite (7. p.)
Estes, R. (2014). The gnu's world: Serengeti wildebeest ecology and life history. University of California Press.
Chicago-viite (17. p.)
Estes, Richard. The Gnu's World: Serengeti Wildebeest Ecology and Life History. Berkeley, California ; Los Angeles, California ; London, England: University of California Press, 2014.
MLA-viite (9. p.)
Estes, Richard. The Gnu's World: Serengeti Wildebeest Ecology and Life History. University of California Press, 2014.
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