Gaya APA

Spiro, R, L. (2003). Management of a sales force . : Mc Graw - Hil/Irwin.New York.

Gaya MLA

Spiro, Rosann, L. "Management of a sales force". : Mc Graw - Hil/Irwin.New York, 2003. Skripsi, Tesis, Disertasi.