Cita APA (7a ed.)

Tapp, A. (2012). Principles of Direct and Database Marketing (4th.). Pearson.

Cita Chicago Style (17a ed.)

Tapp, Alan. Principles of Direct and Database Marketing. 4th. Pearson, 2012.

Cita MLA (9a ed.)

Tapp, Alan. Principles of Direct and Database Marketing. 4th. Pearson, 2012.