TACK ALFRED. (1981). EXECUTIVE DEVELOPMENT. WORLD`S WORK LTD.
Cita Chicago Style (17a ed.)TACK ALFRED. EXECUTIVE DEVELOPMENT. LONDON: WORLD`S WORK LTD, 1981.
Cita MLA (9a ed.)TACK ALFRED. EXECUTIVE DEVELOPMENT. WORLD`S WORK LTD, 1981.
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