New York Academic Press 1977
Buku Teks
editor, Ronald Hamowy
Sage Publications, 2008
Buku Referensi
Sloane, Thomas O., author
Oxford University Press, 2001
Buku Referensi
Americana Corporation, 1980
Buku Referensi
Hiebert, Murray, author
Mc Graw-Hill , 2001
Buku Teks