Academic Press, 2015
eBooks
Tresch, Richard W.
Business Publications ; Georgetown, Ont. : Irwin-Dorsey, 1981.
Buku Teks
Ulbrich, Holley H., author
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Buku Teks
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Kinokuniya , 1959
Buku Teks
Rosen, Harvey S., author
McGraw-Hill, 2010
Buku Teks