Shajahan, S. (2004). Relationship marketing. New York: McGraw-Hill.
Chicago Style aipamenaShajahan, S. Relationship Marketing. New York: McGraw-Hill, 2004.
MLA aipamenaShajahan, S. Relationship Marketing. New York: McGraw-Hill, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.