Gaya APA

GELLER, L, K. (1996). RESPONSE ! THE COMPLETE GUIDE TO PROFITABLE DIRECT MARKETING . NEW YORK: THE FREE PRESS.

Gaya MLA

GELLER, LOIS, K.. "RESPONSE ! THE COMPLETE GUIDE TO PROFITABLE DIRECT MARKETING". NEW YORK: THE FREE PRESS, 1996. Prodi S1 Manajemen.