Childe, Gordon, author
Watts, 1952
Buku Teks
Prothero, Donald R., author
McGraw-Hill, 2010
Buku Teks
Parsons, Talcott, author
Prentice-Hall, 1977
Buku Teks
Kampourakis, Kostas, author
Cambridge University Press, 2014
Buku Teks
Prothero, Donald R.
McGraw-Hill Higher Education, 2004
Buku Referensi