McKim, Robert H.
Brooks/Cole, 1972
Buku Teks
Ennis, Robert Hugh
Prentice-Hall, 1996
Buku Teks
Bambang Utoyo, author
Universitas Indonesia, 2001
UI - Tesis Membership
Turner, Johanna, author
Methuen, 1975
Buku Teks
Harry Waluyo, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1998
UI - Tesis Membership