O`Neill, William L.
Harper & Row Publishers, 1975
Buku Teks SO
Citra Media Persada, 1995
Buku Referensi
Citra Media Persada, 1995
Buku Referensi
Webster, J.B.
Frederick A. Praeger, 1967
Buku Teks SO
Thee, Kian Wie
Institute of South East Asia Studies, 2015
eBooks