Vortsman, H. (1993). Effective product to market management: A quality issue. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Vortsman, H.R. Effective Product to Market Management: A Quality Issue. New York: Prentice-Hall, 1993.
Lua MLA (9ú heag.)Vortsman, H.R. Effective Product to Market Management: A Quality Issue. Prentice-Hall, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.