McCourt, Richard M., author
McGraw-Hill, 1990
Buku Referensi
Lawson, Anton E., author
McGraw-Hill, 1995
Buku Teks
Eiser, Arthur L., author
Burgess Publishing , 1968
Buku Teks
Greenfield, Sydney S.
Burgess Publishing, 1998
Buku Teks
Perry, James W.
Brooks/Cole, 2002
Buku Teks