Nelson, Paul Edward
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Buku Teks
Floyd, Kory, author
McGraw-Hill, 2015
Buku Teks
Payne, James, author
Illinois National Textbook, 1994
Buku Teks
Lucas, Stephen E., author
New York : McGraw-Hill, 1995,
Buku Teks
Carpio, Rustica C., author
Yayasan Obor Indonesia, 2005
Buku Teks