Martin, Jay
Prentice-Hall, 1967
Buku Teks SO
Kotler, John P.
Gramedia Pustaka Utama, 1997
Buku Teks SO
Archipelago Press, 1998
Buku Referensi
McLaren, John
Ling Wah, 1989
Buku Teks SO
Hellwig, Tineke
Centers for South and Southeast Asia Studies University of California at Berkeley , 1994
Buku Teks SO