Friedenberg, Jay
Sage, 2006
Buku Teks
Sun, Ron
Oxford University Press, 2016
eBooks
edited by William Bechtel and George Graham
Blackwell, 1999
Buku Teks
Solso, Robert L., 1933-
Allyn and Bacon, 2001
Buku Teks
Anderson, John R.
N.Y. Worth, 2015
Buku Teks