APA (7e ed.) Bronvermelding

Não informado. (1931). Marketing. Institute of Marketing.

Chicago (17e ed.) Bronvermelding

Não informado. Marketing. London: Institute of Marketing, 1931.

MLA (8e ed.) Bronvermelding

Não informado. Marketing. Institute of Marketing, 1931.

Let op: Deze citaties zijn niet altijd 100% accuraat.