White, Roderick
Advertising : what it is and how to do it
McGraw-Hill, 1980
 Buku Teks
White, Roderick
Advertising : what it is and how to do it
McGraw-Hill, 1993
 Buku Teks
Allen, William Richard, 1924-
What managers do
American Management Association, 1993
 eBooks
How to do just about anything : reader's digest
The Reader's Digest Association, 1988
 Buku Referensi
Martin, Gary
Behavior modification : what it is and how to do it
Prentice-Hall, 1988
 Buku Teks