Adby, P.R., author
John Wiley & Sons, 1980
Buku Teks
Schubert, Thomas F.
John Wiley & Sons, 1996
Buku Teks
Van Valkenburg, M.E. (Mac Elwyn), author
John Wiley, 1960
Buku Teks
Lowfnberg, Edwin C
McGraw-Hill Company, 1967
Buku Teks
Boylestad, Robert L., author
Prentice-Hall, 2000
Buku Teks