Hopper, Melvyn A.
Eurasia Media, 1985
Buku Teks
Downes, John, author
barron's, 2006
Buku Teks
edited by E. Wymeersch
Wolters Kluwer/ Law & Business, 2012
Buku Teks
MacHarg, Marcia L. , author
Wolters Kluwer/Law & Business, 2012
Buku Teks
Francisco, Ronald A., author
[Springer, ], 2012
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