Hanauer, Stephen B.
Raven Press , 1985
Buku Teks
Friedrich, William N., author
Sage Publications, 2001
Buku Teks
Lamanna, Mary Ann, author
Thomson , 2009
Buku Teks
Delaubenfels, Ralph, author
Springer-Verlag, 1994
Buku Teks
Wright, Lorraine M., 1944- , author
F.A. Davis, 2013
Buku Teks