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State Mufti's Office, Prime Minister's Office Brunei Darussalam, 2009
Buku Teks
Moorehead, Alan, author
Four Square Book, 1963
Buku Teks
Warner, Oliver
B.T. Batsford, 1959
Buku Teks
Fleming, Thomas J.
St. Martin's Press, 1960
Buku Teks
Nurul Hanifah Elton, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2016
UI - Makalah dan Kertas Kerja