Hardy, Steve
McGraw-Hill, 1998
Buku Teks SO
edited by Donald Watson, Alan Plattus and Robert G. Shibley
McGraw-Hill, 2003
Buku Referensi
De Chiara, Joseph, 1929-
McGraw-Hill International, 1991
Buku Referensi
editor-in-chief, John Hancock Callender
McGraw-Hill, 1974
Buku Referensi
edited by John Hancock Callender
McGraw-Hill, 1966
Buku Referensi