APA

Cohen W. A., . (1990). The entrepreneur and small business problem solver: an encyclopedic reference and guide. New York: Wiley.

Chicago

Cohen William A, . 1990. The entrepreneur and small business problem solver: an encyclopedic reference and guide. New York: Wiley.

Harvard

Cohen W. A., . (1990). The entrepreneur and small business problem solver: an encyclopedic reference and guide. New York: Wiley.

MLA

Cohen William A, . The entrepreneur and small business problem solver: an encyclopedic reference and guide. New York: Wiley. 1990.