Citazione Stile APA (7a Edizione)

Stone Bob. (1992). Successful direct marketing methods. NTC Bus Books.

Citazione stile Chigago Style (17a edizione)

Stone Bob. Successful Direct Marketing Methods. Chicago: NTC Bus Books, 1992.

Citatione MLA (9a ed.)

Stone Bob. Successful Direct Marketing Methods. NTC Bus Books, 1992.