Campbell, Craig S., author
Wiley, 1999.
Buku Teks
Marsh, William M., author
John Wiley & Sons, 2005
Buku Teks
edited by Catherine Spellman
Actar, 2003
Buku Teks
Caponigro, Paul
McGraw-Hil, 1975
Buku Teks
Munsterberg, Hugo, 1916-1995, author
Charles E. Tuttle, 1955
Buku Teks