APA Style

Heilbroner, R, L. (1968). The Worldly Philosophers : The Lives, Times, and Ideas of the Great Economic Thinkers, 3rd. Ed. . New York: A Clarion Book.

MLA Style

Heilbroner, Robert, L.. "The Worldly Philosophers : The Lives, Times, and Ideas of the Great Economic Thinkers, 3rd. Ed.". New York: A Clarion Book, 1968. Text.