Forsyth, Donelson R., author
Wadsworth and Cengage Learning, 2014
Buku Teks
Luft, Joseph, author
National Press Books, 1970
Buku Teks
Sukiat, author
Departemen Pendidikan dan Kebudayaan, 1979
Buku Teks
Edy Siswoyo, author
1988
UI - Tesis (Membership)
Artikel Jurnal