Kahin, George McTurnan, author
A Delta Book, 1967
Buku Teks
Olson, James Stuart, 1946-, author
Wiley Blackwell, 2014
Buku Teks
Demille, Nelson
Time warner Paperbacks, 2002
Buku Teks
Lorentius Oky Pratama, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2011
UI - Skripsi (Open)
Just, Ward S
Houghton Miffiln, 1968
Buku Teks