Frederich, Louis, author
Thames and Hudson, 1969
Buku Referensi
Brinton, Crane, 1898-1968, author
Prentice-Hall, 1960
Buku Teks
Ellwood, Robert S. Jr
Wardsworth, 1980
Buku Teks
Jabbar, Muhammad Abdul
University of Malaya Press, 1981
Buku Teks
edited by Brian Tierney, Donald Kagan, and L. Pearce Williams; consulting editor: Eugene Rice.
Random House, 1968
Buku Teks