Tyner, Thomas E.
Buku Teks
Bramer, George R., author
Charles E. Merrill Publishing Company, 1981
Buku Teks
Trimmer, Joseph F., author
Houghton Mifflin , 1995
Buku Teks
Goldman, Stephen H., author
Houghton Miffiln, 1986
Buku Teks
McGraw-Hill, 1990
Buku Teks