Klip, Andre, author
Intersentia, 2009
Buku Teks
Barlow, David H., author
Brooks/Cole, 1995
Buku Teks
Barlow, David H., author
Thomson , 2005
Buku Teks
Barlow, David H., author
Wadsworth and Cengage Learning, 2012
Buku Teks
Barlow, David H., author
Connecticut Cengage Learning, 2015
Buku Teks