edited by F.S.C. Northrop
Yale University Press, 1949
Buku Teks
edited by Dagobert D. Runes
Littlefield, Adams & Co., 1959
Buku Referensi
Thomas, Henry, author
Blakiston, 1946
Buku Teks
Christensen, Kit R., author
McGraw-Hill, 2002
Buku Teks
Goldman, Alvin I., author
MIT Press, 1993
Buku Teks