McNicoll, Geoffrey
Gadjah Mada University Press, 1986
Buku Teks
Musselman, Vernon A.
Prentice-Hal , 1969
Buku Teks
McMullen, Stewar Yarwood
Richard D. Irwin, 1979
Buku Teks SO
Presley, John W.
Prentice-Hall, 1982
Buku Teks SO
Lichten, William.
Prentice-Hall, 1999
Buku Teks SO