Smith, Marilyn Z., author
Houghton-Mifflin, 1974
Buku Teks
Dock, V. Thomas, author
Reston Publishing, 1973
Buku Teks
Litecky, Charles R., author
McGraw-Hill, 1987
Buku Teks
Hoover, Stewart V., author
Addison-Wesley, 1990
Buku Teks
Nanney, T. Ray, author
Prentice-Hall, 1981
Buku Teks