APA (7th ed.) Citation

Roberts, W. H. (1941). The problem of choice: An introduction to ethics. Ginn and Co..

Chicago Style (17th ed.) Citation

Roberts, William Henry. The Problem of Choice: An Introduction to Ethics. Boston: Ginn and Co., 1941.

MLA (9th ed.) Citation

Roberts, William Henry. The Problem of Choice: An Introduction to Ethics. Ginn and Co., 1941.

Warning: These citations may not always be 100% accurate.