Vortsman, H. (1993). Effective product to market management: A quality issue. Prentice-Hall.
Chicago-referens (17:e uppl.)Vortsman, H.R. Effective Product to Market Management: A Quality Issue. New York: Prentice-Hall, 1993.
MLA-referens (9:e uppl.)Vortsman, H.R. Effective Product to Market Management: A Quality Issue. Prentice-Hall, 1993.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.