Kember. N.F., author
Edward Arnold, 1984
Buku Teks
Brandon/Systems Press, 1970
Buku Teks
Holzer, Siegfried M.
Elsevier, 1985
Buku Teks
Ryan, Barbara, author
Brooks/Cole Cengage Learning, 2013
Buku Teks
London, Keith R., author
McGraw-Hill, 1976
Buku Teks