Spiller, L. D. (2011). Contemporary direct and interactive marketing (2nd ed.). Dorling kindersly.
Chicago Style aipamenaSpiller, Lisa D. Contemporary Direct and Interactive Marketing. 2nd ed. New Delhi: Dorling kindersly, 2011.
MLA aipamenaSpiller, Lisa D. Contemporary Direct and Interactive Marketing. 2nd ed. Dorling kindersly, 2011.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.