edited by Beth A. Simmons and Richard H. Steinberg
Cambridge University Press, 2006
Buku Teks
Jackson, John H.
MIT Press, 1991
Buku Teks
Spero, Joan Edelman
Routledge , 1997
Buku Teks
Hodgson, John S.
Prentice-Hall, 1983
Buku Teks
Spero, Joan Edelman
Wadsworth, 2010
Buku Teks