Ziegler, J.F.
Pergamon Press, 1985
Buku Referensi
Ziman, J.M.
Vikas Publishing House, 1979
Buku Teks SO
Bube, Richard H.
Academic Press, 1981
Buku Teks SO
Littmark, U.
Pergamon Press, 1980
Buku Referensi
Mrowec, Stanislaw
Elsevier , 1980
Buku Teks SO