Gaya APA
Quelch, John A. (1989).
Sales promotion management .
London:
Prentice Hall.
Gaya Chicago
Quelch, John A.
Sales promotion management.
London:
Prentice Hall,
1989.
Buku.
Gaya MLA
Quelch, John A.
Sales promotion management.
London:
Prentice Hall,
1989.
Buku.
Gaya Turabian
Quelch, John A.
Sales promotion management.
London:
Prentice Hall,
1989.
Buku.