Veithzal Rivai Zainal, author
Murai Kencana, 2004
Buku Teks
John N. Rosyandi
Akademeika Pressindo, 1985
Buku Teks
Yaslis Ilyas, author
Gramedia Pustaka Utama, 2003
Buku Teks
Koolma, A., author
UI-Press, 1988
Buku Teks
Welsh, Alexander N.
Pustaka Binaman Pressindom, 1983
Buku Teks