CRAWFORD, C. M. New products management sixth ed. McGrow-Hill.
Chicago Style (17. basım) AtıfCRAWFORD, C. Merle. New Products Management Sixth Ed. McGrow-Hill.
MLA (8th ed.) AtıfCRAWFORD, C. Merle. New Products Management Sixth Ed. McGrow-Hill.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..