Fifield, Russell H.
Harper, 1958
Buku Teks SO
Savic, Ivan
Routledge, Taylor & Francis Group, 2017
Buku Teks
Yahuda, Michael
Routledge, 1996
Buku Teks SO
editor, Leo Suryadinata
Heinemann Educational Books, 1980
Buku Teks SO
Amitav Acharya
Cornell University Press Singapore ISEAS, 2012
Buku Teks SO