Cita APA (7a ed.)

Weeraman, P. E. (1975). The cooperative principles. International Cooperative Alliance.

Cita Chicago Style (17a ed.)

Weeraman, P. E. The Cooperative Principles. New Delhi: International Cooperative Alliance, 1975.

Cita MLA (9a ed.)

Weeraman, P. E. The Cooperative Principles. International Cooperative Alliance, 1975.