Bauschspies, Wenda K., author
Blacwell Pubishing, 2006
Buku Teks
Morton E. Winston, Ralph D. Edelbach, editors
Wadsworth and Cengage Learning, 2012
Buku Teks
Woodbury, David O.
New York: Harcoust, Brace, 1958
Buku Teks
Kunstler, James Howard, author
Simon and Schuster, 1993
Buku Teks
Siegmar-W. Breckle, editor
Springer, 2012
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