APA aipamena

Westerman, M. D. (1993). The business environmental handbook. The Oasis Press/PSI Research.

Chicago Style aipamena

Westerman, Martin D. The Business Environmental Handbook. Grants Pass, Oregon: The Oasis Press/PSI Research, 1993.

MLA aipamena

Westerman, Martin D. The Business Environmental Handbook. The Oasis Press/PSI Research, 1993.