Παραπομπή σε μορφή APA (7η εκδ.)

Sobel, R. (1974). The entrepreneurs: Explorations within the American business tradition / by Robert Sobel. Weybright and Talley.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sobel, Robert. The Entrepreneurs: Explorations Within the American Business Tradition / by Robert Sobel. New York: Weybright and Talley, 1974.

Παραπομπή σε μορφή MLA (8th εκδ.)

Sobel, Robert. The Entrepreneurs: Explorations Within the American Business Tradition / by Robert Sobel. Weybright and Talley, 1974.