Cotton, F. Albert, author
John Wiley & Sons, 1995
Buku Teks
Goldish, Dorothy M., author
Macmillan, 1990
Buku Teks
Sienko, Michell J., author
McGraw-Hill Kogakusha, 1961
Buku Teks
Busch, Daryle H., author
Allyn and Bacon , 1978
Buku Teks
Busch, Daryle H., author
Allyn and Bacon, 1973
Buku Teks