Cita APA (7th ed.)

Cook, E. Man, energy, society. W.H. Freeman and Company.

Cita Chicago (17th ed.)

Cook, Earl. Man, Energy, Society. San Francisco: W.H. Freeman and Company.

Cita MLA (9th ed.)

Cook, Earl. Man, Energy, Society. W.H. Freeman and Company.

Atenció: Aquestes cites poden no estar 100% correctes.