APA (7th ed.) Citation

Goodpaster, K. E., & Sayre, K. M. (1979). Ethics and problems of the 21st century. University Press.

Chicago Style (17th ed.) Citation

Goodpaster, Kenneth E., and Kenneth M. Sayre. Ethics and Problems of the 21st Century. Notre Dame, Indiana [etc.]: University Press, 1979.

MLA (9th ed.) Citation

Goodpaster, Kenneth E., and Kenneth M. Sayre. Ethics and Problems of the 21st Century. University Press, 1979.