Silverberg, Israel
Prentice-Hall, 1992
Buku Teks SO
edited by Brian Sutton-Smith [and others]
Utah State University Press, 1999
Buku Referensi
Collin, Simon
McGraw-Hill, 1995
Buku Teks SO
Geddes-Brown, Leslie
Page One, 2000
Buku Referensi
Russell B Gunia
USA : ASM International, 1977
Buku Teks