TACK ALFRED. (1981). EXECUTIVE DEVELOPMENT. WORLD`S WORK LTD.
Cita Chicago (17th ed.)TACK ALFRED. EXECUTIVE DEVELOPMENT. LONDON: WORLD`S WORK LTD, 1981.
Cita MLA (9th ed.)TACK ALFRED. EXECUTIVE DEVELOPMENT. WORLD`S WORK LTD, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.