COLBY CHARLES. (2001). TECHNO-READY MARKETING. FREE PRESS.
Chicago Style aipamenaCOLBY CHARLES. TECHNO-READY MARKETING. NEW YORK: FREE PRESS, 2001.
MLA aipamenaCOLBY CHARLES. TECHNO-READY MARKETING. FREE PRESS, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.