Robert L Heilbroner. (1989). The worldly philosophers: The lives, times and ideas of the graet economic tinkers. New York: Simon and Schuster.
استشهاد بنمط شيكاغوRobert L Heilbroner. The Worldly Philosophers: The Lives, Times and Ideas of the Graet Economic Tinkers. New York: Simon and Schuster, 1989.
MLA استشهادRobert L Heilbroner. The Worldly Philosophers: The Lives, Times and Ideas of the Graet Economic Tinkers. New York: Simon and Schuster, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.