Bureau of Aboriginal Affairs, 1911
Buku Teks
Campbell, William, author
Marshall Brothers, [date of publication not identified]
Buku Teks
Yekti Wahyuni, author
Universitas Indonesia, 2018
UI - Tesis (Membership)
Sirajul Islam
Erasmus University , 1985
Buku Teks
Gulaid, Mahamoud Awaleh
Islamic Research and Training Institute, Islamic Development Bank , 1990
Buku Teks