Flanagan, Robert J.
Scott, Foresman, 1984
Buku Teks
Reynolds, Lloyd G., author
Prentice-Hall, 1978
Buku Teks
Marshall, F. Ray
Ill. Richard D. Irwin , 1980
Buku Teks
Reynolds, Lloyd G., author
Prentice-Hall, 1998
Buku Teks
Reynolds, Lloyd G., author
Prentice-Hall, 1959
Buku Teks