Sobel, R. (1974). The entrepreneurs: Explorations within the American business tradition / by Robert Sobel. Weybright and Talley.
Chicago-Zitierstil (17. Ausg.)Sobel, Robert. The Entrepreneurs: Explorations Within the American Business Tradition / by Robert Sobel. New York: Weybright and Talley, 1974.
MLA-Zitierstil (8. Ausg.)Sobel, Robert. The Entrepreneurs: Explorations Within the American Business Tradition / by Robert Sobel. Weybright and Talley, 1974.
警告：這些引文格式不一定是100％准確.