Allen, C. (1998). Internet world guide to one-to-one web marketing. Wiley.
Chicago Style aipamenaAllen, Cliff. Internet World Guide to One-to-one Web Marketing. New York: Wiley, 1998.
MLA aipamenaAllen, Cliff. Internet World Guide to One-to-one Web Marketing. Wiley, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.