CRANDALL RICK. (1998). 1001 WAYS TO MARKET YOUR SERVICES. CONTEMPORARY BOOK.
Chicago Style aipamenaCRANDALL RICK. 1001 WAYS TO MARKET YOUR SERVICES. U S A: CONTEMPORARY BOOK, 1998.
MLA aipamenaCRANDALL RICK. 1001 WAYS TO MARKET YOUR SERVICES. CONTEMPORARY BOOK, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.