Não informado. (1991). Training and Development. American Society for Training and Development.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Training and Development. Alexandria, Va: American Society for Training and Development, 1991.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Training and Development. American Society for Training and Development, 1991.
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