English Language Book Society (ELBS), 1987
Buku Teks
Summa, Don J.
American Institute of Certified Public Accountants, [date of publication not identified]
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Matthews, Don Q.
Petrocelli/Charter, 1976
Buku Teks
Lampo, Hubert, author
Manteau , 1943
Buku Teks
Jang, Eul-byong
Seoul Bom U-du 1988
Buku Teks