Thomas, Robert Murray, 1921-
Corwin Press, 2008
Buku Teks
Thomas, Robert Murray, 1921-
Bergin & Garvey, 2000
Buku Teks
Sanders, Lalage D.
BPS Blackwell, 2010
Buku Teks
Brink, Pamela J.
Jones and Bartlett, 1988
Buku Teks
Wood, Marilynn J.
Jones and Bartlett , 2011
Buku Teks