Cita APA (7th ed.)
Hallpike, C. R. (1988). The principles of social evolution. Clarendon press.
Cita Chicago (17th ed.)
Hallpike, C. R. The Principles of Social Evolution. Oxford: Clarendon press, 1988.
Cita MLA (9th ed.)
Hallpike, C. R. The Principles of Social Evolution. Clarendon press, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.