Frain, J. (1981). Introduction to marketing. Macdonald and evans.
Chicago Style aipamenaFrain, John. Introduction to Marketing. Estover: Macdonald and evans, 1981.
MLA aipamenaFrain, John. Introduction to Marketing. Macdonald and evans, 1981.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.