Robert, Christian P.
Springer, 1999
Buku Teks SO
Meier, Peter C.
John Wiley & Sons, 1993
Buku Teks
Johnson, Palmer O.
Prentice-Hall, 1953
Buku Teks
Armitage, P.
Blackwell Scientific Publication, 1985
Buku Teks
Arkin, Herbert
Barnes & Noble, 1957
Buku Teks