Carek, Donald J., author
Jason Aronson Inc, 1993
Buku Teks
Johnson, James H., author
Allyn and Bacon, 1997
Buku Teks
Ross, Alan O., author
John Wiley & Sons, 1981
Buku Teks
Nahm, Sheena
Maryland : Lexington Books, 2014
Buku Teks
Semrud-Clikeman, Margaret, author
Allyn and Bacon, 1995
Buku Teks