David L. Sills, editor
The Free Press; Coolier Macmillan Publisher, 1979
Buku Referensi
Grabar, V.E., author
Clarendon Press, 1990
Buku Referensi
edited by Ronald Baughman
Gale Reserach , 1986
Buku Referensi
Williamson, J.A.
Macmillan, 1965
Buku Teks
Parkinson, C. Northcote (Cyril Northcote), 1909-1993, author
University of Malaya Press, 1964
Buku Teks