APA (7e ed.) Bronvermelding

CRAWFORD, C. (1991). New products management.-- ed.3. Irwin.

Chicago (17e ed.) Bronvermelding

CRAWFORD, C.Merle. New Products Management.-- Ed.3. Homewood: Irwin, 1991.

MLA (9e ed.) Bronvermelding

CRAWFORD, C.Merle. New Products Management.-- Ed.3. Irwin, 1991.