Lago, Gladwyn V.
John Wiley & Sons, 1979
Buku Teks
Boylestad, Robert L., author
Pearson - Prentice Hall, 2009
Buku Teks
Boylestad, Robert L., author
Prentice-Hall, 1982
Buku Teks
Boylestad, Robert L.
Pearson Prentice Hall, 2013
Buku Teks
Budak, Aram, author
Prentice-Hall, 1978
Buku Teks