Omar, Asmah Haji, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1963
UI - Skripsi Membership
Ranney, Austin, author
American Enterprise Institute, 1985
Buku Teks
Glenister, A.G.
Oxford University Press, 1971
Buku Referensi
Rauf, M.A.
Oxford University Press, 1967
Buku Teks
Yamaguchi Motoki, author
Southeast Asian Studies, Kyoto University, 2021
Artikel Jurnal