Folland, Sherman
Prentice-Hall, 2001
Buku Teks SO
Hicks, Lanis L.
Jones & Bartlett Learning, 2014
Buku Teks SO
Feldstein, Paul J.
Delmar, 1999
Buku Teks SO
Ruchlin, Hirsch S.
Charles C. Thomas, 1973
Buku Teks SO
Feldstein, Paul J.
Delmar, 2012
Buku Teks SO