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