Christian Soe
McGraw-Hill, 2004
Buku Teks
Barringron, Lowell
Wadsworth and Cengage Learning, 2013
Buku Teks
McCormick, John, 1954-
Thomson Wadsworth, 2004
Buku Teks
Fried, Robert C.
Prentice-Hall, 1980
Buku Teks
Hauss, Charles
Thomson Learning, 2003
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