Cita APA (7a ed.)

Sontag, F., Beckner, M. O., Fogelin, R. J., & Jones, W. (1969). Approaches to ethics: Representative Selections from Classical Times to the Present (2a.). McGraw-Hill Book Company.

Cita Chicago Style (17a ed.)

Sontag, Frederick, Morton O. Beckner, Robert J. Fogelin, y W.T Jones. Approaches to Ethics: Representative Selections from Classical Times to the Present. 2a. New York: McGraw-Hill Book Company, 1969.

Cita MLA (9a ed.)

Sontag, Frederick, et al. Approaches to Ethics: Representative Selections from Classical Times to the Present. 2a. McGraw-Hill Book Company, 1969.