Feigenbaum, Armand Vallin, author
McGraw-Hill, 1986
Buku Teks
Feigenbaum, Armand Vallin, author
McGraw-Hill, 1983
Buku Teks
Robertson, A.G.
Thomas Nelson & Sons , 1971
Buku Teks
Artikel Jurnal
Hansen, Bertrand L., author
Prentice-Hall, 1966
Buku Teks