APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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