Metzger, Daniel L., author
Prentice-Hall, 1981
Buku Teks
Robinson, Vester, author
Reston Publishing Company, 1974
Buku Referensi
Genn, Robert C., author
Parker Publishing Company, 1977
Buku Referensi
Genn, Robert C., author
Parker Publishing Company, 1977
Buku Referensi
Brombacher, A.C., author
John Wiley & Sons, 1992
Buku Teks