Cita APA (7th ed.)
Tapp, A., Whitten, I., & Housden, M. (2014). Principles of Direct, Database and Digital Marketing (Fifth edition.). Pearson International Content.
Cita Chicago (17th ed.)
Tapp, Alan, Ian Whitten, i Matthew Housden. Principles of Direct, Database and Digital Marketing. Fifth edition. Harlow: Pearson International Content, 2014.
Cita MLA (9th ed.)
Tapp, Alan, et al. Principles of Direct, Database and Digital Marketing. Fifth edition. Pearson International Content, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.