Cateora, Philip R., author
Richard D. Irwin, 1996
Buku Teks
Cateora, Philip R., author
McGraw-Hill, 1999
Buku Teks
Bolt, Gordon, author
Crest publishing, 1999
Buku Referensi
Kotler, Philip, author
Erlangga , 1996
Buku Teks
Mandell, Maurice I.
Prentice-Hall, 1985
Buku Teks