Nakao, Shuichiro, author
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Artikel Jurnal
Malouf, Doug, author
Business & Professional , 1994
Buku Teks
Sharon E. Straus, Paul Glasziou
Churchill Livingstone Elsevier, 2011
Buku Teks
Koch, Janice, author
Wadsworth , 2012
Buku Referensi
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