Roberts , P. (2004). Liven up your meeting: 50 tried and tested ways. Infinity Books.
Citace podle Chicago (17th ed.)Roberts , Phelps. Liven Up Your Meeting: 50 Tried and Tested Ways. New Delhi: Infinity Books, 2004.
Citace podle MLA (9th ed.)Roberts , Phelps. Liven Up Your Meeting: 50 Tried and Tested Ways. Infinity Books, 2004.
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