Cita APA

Johnston, M. W., & Marshall, G. W. (2008). Relationship selling (2nd ed.). New York, NY: McGraw-Hill/Irwin.

Chicago Style Citation

Johnston, Mark W., i Greg W. Marshall. Relationship Selling. 2nd ed. New York, NY: McGraw-Hill/Irwin, 2008.

Cita MLA

Johnston, Mark W., i Greg W. Marshall. Relationship Selling. 2nd ed. New York, NY: McGraw-Hill/Irwin, 2008.