Berlyn, Graeme P., author
Iowa State University Press, 1976
Buku Teks
Sass, John E., author
Iowa State University Press, 1994
Buku Teks
edited by Peter Gray
Van Nostrand Reinhold, 1973
Buku Referensi
Bradbury, Savile, author
Oxford University Press, 1984
Buku Teks
editor, Roy Upton ...[et al.]
CRC Press, 2011
Buku Teks