Cita APA

Roberts, G. (2007). Evolution of direct and indirect reciprocity. The Royal Society.

Chicago Style Citation

Roberts, Gilbert. Evolution of Direct and Indirect Reciprocity. The Royal Society, 2007.

Cita MLA

Roberts, Gilbert. Evolution of Direct and Indirect Reciprocity. The Royal Society, 2007.

Atenció: Aquestes cites poden no estar 100% correctes.