Wortman, L. A. (1976). Successful small business management. New York: AMACOM.
Trích dẫn kiểu ChicagoWortman, Leon A. Successful Small Business Management. New York: AMACOM, 1976.
Deismireacht MLAWortman, Leon A. Successful Small Business Management. New York: AMACOM, 1976.
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