Weis, Gregory L
Prentice-Hall, 1996
Buku Teks
Macmillan Education, 1995
Buku Teks
edited by Jonathan Gabe, Michael Calnan and Michael Bury
Routledge , 1991
Buku Teks SO
Barry, Anne-Marie
Sage, 2016
Buku Teks SO
Helman, Cesil G., 1944-
Boston Wright, 1990
Buku Teks SO