Stone, B. (1986). Successful direct marketing methods/3e (3rd ed.). Crain books.
Chicago-stil citatStone, Bob. Successful Direct Marketing Methods/3e. 3rd ed. Crain books, 1986.
MLA-referensStone, Bob. Successful Direct Marketing Methods/3e. 3rd ed. Crain books, 1986.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.