APA (7th ed.) Citation

Terkel, S. N., & Duval, R. S. (1999). Encyclopedia of ethics. Facts on File.

Chicago Style (17th ed.) Citation

Terkel, Susan Neiburg, and R. Shannon Duval. Encyclopedia of Ethics. New York: Facts on File, 1999.

MLA (9th ed.) Citation

Terkel, Susan Neiburg, and R. Shannon Duval. Encyclopedia of Ethics. Facts on File, 1999.