Vernon-Wortzel, Heidi, author
John Wiley & Sons, 1991
Buku Teks
Hunger, J. David, 1941-, author
Prentice-Hall, 2001
Buku Teks
Davidson, William H., author
John Wiley & Sons, 1982
Buku Teks
Vernon-Wortzel, Heidi, author
John Wiley & Sons, 1997
Buku Teks
Gamble, John, author
McGraw-Hill , 2015
Buku Teks