APA (7th ed.) Citation

Caplan, A. L., & Callahan, D. (1981). Ethics in Hard Times. Springer US.

Chicago Style (17th ed.) Citation

Caplan, Arthur L., and Daniel Callahan. Ethics in Hard Times. Boston, MA: Springer US, 1981.

MLA (9th ed.) Citation

Caplan, Arthur L., and Daniel Callahan. Ethics in Hard Times. Springer US, 1981.