Chapman, P. G. (1993). The economics of training. Harvester Wheatsheaf.
Lua i Stíl Chicago (17ú heag.)Chapman, Paul G. The Economics of Training. New York: Harvester Wheatsheaf, 1993.
Lua MLA (9ú heag.)Chapman, Paul G. The Economics of Training. Harvester Wheatsheaf, 1993.
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