Crawford, C. M. (1997). New products management (5th ed.). Irwin.
Chicago Style aipamenaCrawford, C. Merle. New Products Management. 5th ed. Chicago: Irwin, 1997.
MLA aipamenaCrawford, C. Merle. New Products Management. 5th ed. Irwin, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.