Bennett, R. (1988). Improving trainer effectiveness. Gower.
Lua i Stíl Chicago (17ú heag.)Bennett, Roger. Improving Trainer Effectiveness. Aldershot, Hants, England ; Brookfield, Vt., USA: Gower, 1988.
Lua MLA (9ú heag.)Bennett, Roger. Improving Trainer Effectiveness. Gower, 1988.
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