APA Alıntı

Gorle Peter & James Long. (1973). Essentials of product planning. McGraw hill.

Chicago Stili Alıntı

Gorle Peter ve James Long. Essentials of Product Planning. London: McGraw hill, 1973.

MLA Alıntı

Gorle Peter ve James Long. Essentials of Product Planning. McGraw hill, 1973.