Berent, Stanley
Taylor & Fransic, 2009
Buku Teks SO
Kluwer Academic Publishers, 1995,
Buku Referensi
Gambhir, R.S.
McGraw-Hill, 1980
Buku Teks SO
edited by A.J. Marshall, W.D. Williams
Macmillan, 1978
Buku Teks
Frauenfelder, P. (Paul)
Pergamon Press, 1966
Buku Teks SO