DICKSON D E N. (1991). IMPROVE YOUR BUSINESS: WORKBOOK. OXFORD UNIVERSITY PRESS.
Chicagoスタイル(17版)引用形式DICKSON D E N. IMPROVE YOUR BUSINESS: WORKBOOK. MUMBAI MADRAS: OXFORD UNIVERSITY PRESS, 1991.
MLA(9版)引用形式DICKSON D E N. IMPROVE YOUR BUSINESS: WORKBOOK. OXFORD UNIVERSITY PRESS, 1991.
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