Turner, Jeffrey S., author
Harcourt Brace College, 1995
Buku Teks
Pikunas, Justin, author
McGraw-Hill, 1976
Buku Teks
Garrison, Karl C.
International textbook , 1969
Buku Teks
Berk, Laura E., author
Allyn and bocon , 2001
Buku Teks
Dacey, John S., author
McGraw-Hill, 2002
Buku Teks