APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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