Mills, Gordon H.
Holt, Rinehart and Winston, 1954
Buku Teks SO
Budinski, Kenneth G.
ASM International, 2001
eBooks
Haramundanis, Katherine
Digital Press, 1992
Buku Teks SO
general editor, Philip Rubens
Henry Holt and Company, 1992
Buku Referensi
Weisman, Herman M.
Charles E. Merrill, 1980
Buku Teks SO