Cita APA (7a ed.)

Heijder, A., & Geuns, H. v. (1976). Professional codes of ethics. Amnesty International.

Cita Chicago Style (17a ed.)

Heijder, Alfred, y Herman van Geuns. Professional Codes of Ethics. London: Amnesty International, 1976.

Cita MLA (9a ed.)

Heijder, Alfred, y Herman van Geuns. Professional Codes of Ethics. Amnesty International, 1976.