Grove, Daniel W., author
McGraw-Hill, 2003
Buku Teks
Faulkner, Ann, author
Chapman & Hall, 1995
Buku Teks
McConnell, Charles R., author
Jones & Bartlett Learning, 2014
Buku Teks
Little, Brown and Company, 1973
Buku Teks
Kathy Priscilla Glory, author
John Wiley & Sons, 1981
Buku Teks