Ulbrich, Holley H., author
Taylor and Francis, 2013
Buku Teks
Prest, A.R., author
English Language Book Society, 1974
Buku Teks
Musgrave, Richard A., author
McGraw-Hill, 1983
Buku Teks
Tresch, Richard W.
Business Publications ; Georgetown, Ont. : Irwin-Dorsey, 1981.
Buku Teks
Academic Press, 2015
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