Demirel, Yasar
Springer, 2012
eBooks
Ramage, Janet, 1932-
Oxford University Press, 1983
Buku Teks SO
Chigier, N. A.
McGraw-Hill, 1981
Buku Teks
DiLavore, Philip
John Wiley & Sons, 1984
Buku Teks
general editor, Malcolm Slesser
Nichols Publishing, 1988
Buku Referensi