Bozeman, Barry
St. Martin's Press, 1979
Buku Teks
Hood, Christopher C.
John Wiley & Sons, 1976
Buku Teks
Ramdha Hari Nugraha
Universitas Indonesia, 2008
UI - Skripsi Open
Prijanto
Timpani Publishing, 2009
Buku Teks
Ayu Ning Astika
Universitas Indonesia, 2008
UI - Skripsi Open