Lewin, Kurt, author
Harper & Brothers, 1948
Buku Teks
Hogg, Michael A., 1954-, author
London, 1988
Buku Teks
DeLamater, John D., author
Colorado Westview Press, 2014
Buku Teks
Pines, Ayala, author
McGraw-Hill, 1993
Buku Teks
Baron, Robert A., author
Heights Allyn and Bacon , 1991
Buku Teks