Ramsay, Michael C., author
John Wiley & Sons, 2002
Buku Teks
edited by Ronald J. Prinz
Jessica Kingsley, 1991
Buku Teks
editor Ronald J. Prinz
Jessica Kingsley Publishers, 1991
Buku Referensi
Simeonsson, Rune J., author
Allyn and Bacon, 1986
Buku Teks
Lidz, Carol Schneider, author
John Wiley & Sons, 2003
Buku Teks