BPS Blackwell, 2004
Buku Teks SO
edited by Harry T. Reis and Charles M. Judd
Cambridge University Press, 2000
Buku Teks SO
Cozby, Paul C.
McGraw-Hill, Higher Education, 2008
Buku Teks SO
Gravetter, Frederick J.
Wadsworth, 2012
Buku Teks SO
Cozby, Paul C.
McGraw-Hill, 2012
Buku Teks SO