Folland, Sherman
Prentice-Hall, 1997
Buku Teks
Folland, Sherman
Prentice-Hall, 2001
Buku Teks
edited by Tom Sorell
Routledge, 1998
Buku Teks
Duncan, Peter
Sage, 2014
Buku Teks SO
Harold W. Baillie, John McGeehan, Thomas M. Garrett, Rosellen M. Garrett
Pearson, 2013
Buku Teks SO