Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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