Gaya APA
Ardianto, J., Aini, .
(2015).
177 Problem Solving of Direct Marketing
(
Cet.1)
.
Yogyakarta:
Flashbooks.
Gaya MLA
Ardianto, Jony., Aini, .
"177 Problem Solving of Direct Marketing".
Cet.1
Yogyakarta:
Flashbooks,
2015.
Textbook.