Pole, Andy
Chapman & Hall, 1994
Buku Teks
Hinkle, Dennis E.
Houghton Mifflin, 2003
Buku Teks SO
Healey, Joseph F., 1945-
Cengage Learning, 2015
Buku Teks
Williams, Frederick
Harcourt Brace Jovanovich College Publishers, 1992
Buku Teks
Elifson, Kirk W., 1943-
McGraw-Hill, 1990
Buku Teks