Simpson, Peter, author
Chapman and Hall, 1994
Buku Teks
Kreitzberg, Charles B., author
Harcourt Brace Javanovich, 1982
Buku Teks
Nanney, T. Ray, author
Prentice-Hall, 1981
Buku Teks
Seeds, Harice L., author
John Wiley & Sons, 1981
Buku Teks
Davis, Robert H., author
McGrow-Hill Book, 1974
Buku Teks