Goddard, Hugh
Serambi Ilmu Semesta, 2013
Buku Teks
edited by Douglas Pratt, Jon Hoover, John Davies, John Chesworth
Brill, 2015
eBooks
MacDonald, William
George Braziller, 1962
Buku Teks
Krautheimer, Richard
Penguin Books, 1965
Buku Teks
Vernoit, Stephen, edited
I.B. Tauris Publishers, 2000
Buku Referensi