Keosian,John
Reinhold Publishing Corporation, 1964
Buku Teks
Tobin, Allan J., author
Harcourt College Publishing, 2001
Buku Teks
Purves, William K., author
The Mona GrOup LLC, 1998
Multimedia
Rahn, Joan E., author
Macmillan, 1974
Buku Teks
Simpson, George Gaylord, author
Harcourt Brace & World, 1969
Buku Teks