Cita APA (7th ed.)

Rolston, H. (1988). Environmental Ethics: Duties to and values in the natural world. Temple University Press.

Cita Chicago (17th ed.)

Rolston, Holmes. Environmental Ethics: Duties to and Values in the Natural World. Philadelphia: Temple University Press, 1988.

Cita MLA (9th ed.)

Rolston, Holmes. Environmental Ethics: Duties to and Values in the Natural World. Temple University Press, 1988.