APA-referens (7:e uppl.)

Botzler, R. G., & Armstrong, S. J. (1998). Environmental ethics: Divergence and convergence (2nd ed.). McGraw-Hill.

Chicago-referens (17:e uppl.)

Botzler, Richard George, och Susan J. Armstrong. Environmental Ethics: Divergence and Convergence. 2nd ed. Boston, Mass: McGraw-Hill, 1998.

MLA-referens (9:e uppl.)

Botzler, Richard George, och Susan J. Armstrong. Environmental Ethics: Divergence and Convergence. 2nd ed. McGraw-Hill, 1998.