Gaya APA

G., B, I. (1972). Earth might be fair: Reflections on ethics, religion, and ecology (Trawas) . New Jersey: Prentice-Hall, Inc..

Gaya MLA

G., Barbour, Ian. "Earth might be fair: Reflections on ethics, religion, and ecology (Trawas)". New Jersey: Prentice-Hall, Inc., 1972. Text.