Gallup, George, author
McGraw-Hill, 1982
Buku Teks
Awang Abdul Aziz bin Juned, author
State Mufti's Office, Prime Minister's Office Brunei Darussalam, 2009
Buku Teks
Gupta, Sanjay, author
Welness Press, 2009
Buku Teks
Eliade, Mircea, author
Pantheon Books, 1954
Buku Teks
Phan, Peter C., author
Kanisius, 2005
Buku Teks