Westerman, M. D. (1993). The business environmental handbook. The Oasis Press/PSI Research.
Citación estilo ChicagoWesterman, Martin D. The Business Environmental Handbook. Grants Pass, Oregon: The Oasis Press/PSI Research, 1993.
Cita MLAWesterman, Martin D. The Business Environmental Handbook. The Oasis Press/PSI Research, 1993.
Warning: These citations may not always be 100% accurate.