Crandall, R. (2003). Marketing your services: For people who hate to sell (Updated and expanded ed.). McGraw Hill.
Chicago Style aipamenaCrandall, Rick. Marketing Your Services: For People Who Hate to Sell. Updated and expanded ed. New Jersey: McGraw Hill, 2003.
MLA aipamenaCrandall, Rick. Marketing Your Services: For People Who Hate to Sell. Updated and expanded ed. McGraw Hill, 2003.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.