Maisel, Sherman J.
McGraw-Hill, 1976
Buku Teks
Creedy, Judith
McGraw-Hill , 1979
Buku Teks
editor, Joseph L. Pagliari
Irwin, 1996
Buku Referensi
Randel, Jim, author
Facts on File Publications, 1986
Buku Teks
Kau, James B., author
McGraw-Hill, 1985
Buku Teks