Leigh, Denis
A concise encyclopaedia of psychiatry
M.T.P. Press, 1977
 Buku Referensi
The Middle Ages : a concise encyclopaedia
general editor, H.R. Loyn
Thames and Hudson, 1991
 Buku Referensi
Ronart, Stephan
Concise encyclopaedia of arabic Civilization
Djembatan, 1964
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Psychiatry
edited by David A. Hamburg
Prentice-Hall, 1970
 Buku Teks
Eaton, Merrill T.
Psychiatry
Medical Examination, 1976
 Buku Teks