Cita APA (7a ed.)

Hargrove, E. C. (1989). Foundations of environmental ethics. Prentice-Hall.

Cita Chicago Style (17a ed.)

Hargrove, Eugene C. Foundations of Environmental Ethics. Englewood Cliffs, New Jersey: Prentice-Hall, 1989.

Cita MLA (9a ed.)

Hargrove, Eugene C. Foundations of Environmental Ethics. Prentice-Hall, 1989.