Korner, Christian
Springer, 2012
eBooks
Reynolds, C.S.
Cambridge University Press, 1993
Buku Teks SO
Kormondy, Edward J.
Prentice-Hall, 1976
Buku Teks SO
Brewer, Richard
Saunders College Publishing, 1994
Buku Teks SO
Krohne, David T.
Brook/Cole, 2001
Buku Teks SO