Heilbroner, R. L. (1991). Worldly Philosophers: The lives, times and ideas of the great economic thinkers (6th.). Penguin Books.
استشهاد بنمط شيكاغوHeilbroner, Robert L. Worldly Philosophers: The Lives, Times and Ideas of the Great Economic Thinkers. 6th. London: Penguin Books, 1991.
MLA استشهادHeilbroner, Robert L. Worldly Philosophers: The Lives, Times and Ideas of the Great Economic Thinkers. 6th. Penguin Books, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.