Heizer, Jay
Prentice-Hal, 1996
Buku Teks
Stevenson, William J.
Boston: McGraw-Hill, 1999
Buku Teks
Mayer, Raymond R.
McGraw-Hill, 1982
Buku Teks
Stevenson, William J.
Richard D. Irwin, 1990
Buku Teks
Stevenson, William J.
Irwin McGraw-Hill, 1999
Buku Teks