APA (7th ed.) Citation

Regan, T., & Singer, P. (1989). Animal rights and human obligations (2nd ed.). Prentice-Hall.

Chicago Style (17th ed.) Citation

Regan, Tom, and Peter Singer. Animal Rights and Human Obligations. 2nd ed. Englewood Cliffs: Prentice-Hall, 1989.

MLA (9th ed.) Citation

Regan, Tom, and Peter Singer. Animal Rights and Human Obligations. 2nd ed. Prentice-Hall, 1989.