Bird, Doni L., author
Elsevier Saunders, 2012
Buku Teks
Bartolomucci Boyd, Linda R., author
Elsevier Saunder, 2012
Buku Referensi
Thomson, Evelyn M., author
Pearson, 2012
Buku Teks
Johnson, Orlen N., author
Pearson Prentice Hall, 2007
Buku Teks
Thomson Delmar Learning, 2008
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