Barzun, Jacques, author
Thomson, 2004
Buku Teks
Rothman, Kenneth J., author
Lippincott Williams / Wilkins, 2008
Buku Teks
Edwards, Anne, author
Longman, 1996
Buku Teks
Walliman, Nicholas, author
Sage Publications Ltd , 2001
Buku Teks
Yu-Kang Tu, editor
[, Springer], 2012
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