Lustbader, Eric V
New York:, 1990
Buku Teks
White, R. J.
Harper & Brothers, 1961
Buku Teks
Bayu Kristianto, author
2000
UI - Skripsi (Membership)
Canot, Robert
New York Bantam Books c 1967
Buku Teks
Stafford, J.
New York Harcourt, Brace and Company 1944
Buku Teks