APA aipamena

Kümmerli, R., Colliard, C., Fiechter, N., Petitpierre, B., Russier, F., & Keller, L. (2007). Human cooperation in social dilemmas: Comparing the Snowdrift game with the Prisoner's Dilemma. The Royal Society.

Chicago Style aipamena

Kümmerli, Rolf, Caroline Colliard, Nicolas Fiechter, Blaise Petitpierre, Flavien Russier, and Laurent Keller. Human Cooperation in Social Dilemmas: Comparing the Snowdrift Game With the Prisoner's Dilemma. The Royal Society, 2007.

MLA aipamena

Kümmerli, Rolf, et al. Human Cooperation in Social Dilemmas: Comparing the Snowdrift Game With the Prisoner's Dilemma. The Royal Society, 2007.