APA

Heilbroner R. L., . (1961). The worldly philosophers: the lives, times, and ideas of the great economic thinkers. New York: Simon and Schuster.

Chicago

Heilbroner Robert L, . 1961. The worldly philosophers: the lives, times, and ideas of the great economic thinkers. New York: Simon and Schuster.

Harvard

Heilbroner R. L., . (1961). The worldly philosophers: the lives, times, and ideas of the great economic thinkers. New York: Simon and Schuster.

MLA

Heilbroner Robert L, . The worldly philosophers: the lives, times, and ideas of the great economic thinkers. New York: Simon and Schuster. 1961.