“References.” The Calculus of Selfishness: by Karl Sigmund, Princeton University Press, PRINCETON; OXFORD, 2010, pp. 155–168, www.jstor.org/stable/j.ctt7sw18.11. Accessed 17 Jan. 2021.
Sigmund, K. (2010). References. In The Calculus of Selfishness: (pp. 155-168). PRINCETON; OXFORD: Princeton University Press. Retrieved January 17, 2021, from http://www.jstor.org/stable/j.ctt7sw18.11
Sigmund, Karl. "References." In The Calculus of Selfishness:, 155-68. PRINCETON; OXFORD: Princeton University Press, 2010. Accessed January 17, 2021. http://www.jstor.org/stable/j.ctt7sw18.11.
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