Goodall, H. Lloyd., author
Wadsworth and Cengage Learning, 2010
Buku Teks
Beamer, Linda, author
McGraw-Hill, 2008
Buku Teks
Varner, Iris V., author
IRWIN , 1995
Buku Teks
Curtis, Dan B., author
Rosda Jayaputra, 1996
Buku Teks
Beamer, Linda, author
McGraw-Hill, 2008
Buku Teks