Stebbing, Lionel
Ellis Horwood, 1990
Buku Teks
by Dale H. Besterfield ... [and others]
Prentice-Hall, 1995
Buku Teks
Evans, James Robert, 1950-
South-Western, 2002
Buku Teks
Evans, James Robert, 1950-
South Western Cengage Learning, 2011
Buku Teks
Hradesky, John L.
McGraw-Hill, 1995
Buku Referensi