Παραπομπή APA
Dorland, G. N., & Wal, J. v. d. (1978). The business idea: From birth to profitable company. New York: Van Nostrand Reinhold.
Παραπομπή Chicago StyleDorland, Gilbert N., and John van der Wal. The Business Idea: From Birth to Profitable Company. New York: Van Nostrand Reinhold, 1978.
Παραπομπή MLADorland, Gilbert N., and John van der Wal. The Business Idea: From Birth to Profitable Company. New York: Van Nostrand Reinhold, 1978.
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