Goldman, Alvin I.
MIT Press, 1993
Buku Teks
edited by Herbert Morris
Stanford University Press, 1961
Buku Teks
Stumpf, Samuel Enoch, 1918-1998
McGraw-Hill, 2012
Buku Teks
Abel, Donald C, 1952-
McGraw - Hill , 2012
Buku Teks
Christensen, Kit R.
McGraw-Hill, 2002
Buku Teks