Kingdon, Frank, author
Arco Publishing, 1944
Buku Teks
Conrad, Earl
New York, 1961
Buku Teks
editor, Paul Boyer
Ivan R. Dee, 1900
Buku Referensi
Ahmad Bahrudin, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1992
UI - Skripsi Membership
McBride, James, author
Riverhead Books, 1996
Buku Teks