McLoughlin, James A.
Charles E. Merrill , 1981
Buku Teks
Taylor, Ronald L., author
Allyn and Bacon, 2003
Buku Teks
edited by Martha E. Snell
Charles E. Merrill, 1983
Buku Teks
Lidz, Carol Schneider, author
John Wiley & Sons, 2003
Buku Teks
Ramsay, Michael C., author
John Wiley & Sons, 2002
Buku Teks