David W. Springer, Albert R. Roberts, editor
Jones and Bartlett Publishers, 2011
Buku Teks
Sandhu, Harjit S.
Human Sciences Press, 1981
Buku Teks
Lawrence, Richard
Sage, 2008
Buku Teks
Eldefonso, Edward
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Buku Teks
edited by S.M. Waddams
University of Toronto Press, 1971
Buku Teks