APA引文

Roberts, W. H. (1941). The problem of choice: An introduction to ethics. Boston: Atheneum Press.

Παραπομπή Chicago Style

Roberts, William Hehry. The Problem of Choice: An Introduction to Ethics. Boston: Atheneum Press, 1941.

MLA引文

Roberts, William Hehry. The Problem of Choice: An Introduction to Ethics. Boston: Atheneum Press, 1941.

警告：這些引文格式不一定是100％准確.