APA aipamena

Spillard, P. (1975). Sales promotion (2nd ed.). Business books.

Chicago Style aipamena

Spillard, P. Sales Promotion. 2nd ed. Business books, 1975.

MLA aipamena

Spillard, P. Sales Promotion. 2nd ed. Business books, 1975.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.