Gaya APA

Martin, N, ,., Highfield, R. (2011). Super cooperators : evolution, altruism and human behavior or why we need each other to succeed . Edinburgh: Canongate Books.

Gaya MLA

Martin, Nowak, ,., Highfield, Roger. "Super cooperators : evolution, altruism and human behavior or why we need each other to succeed". Edinburgh: Canongate Books, 2011. Text.