Rossi, Renzo
Macmillan, 1996
Buku Referensi
Ralby, Aaron
Parragon Books, 2013
Buku Referensi
Kyung Hee University, 2008
Buku Referensi
edited by Edward Whiting Fox
Oxford University Press, 1957
Buku Teks
Sellman, Roger Raymond
Edward Arnold, 1954
Buku Referensi