Não informado. (1990). Personnel Training and Education. Library Association, Personnel Training and Education Group.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Personnel Training and Education. London: Library Association, Personnel Training and Education Group, 1990.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Personnel Training and Education. Library Association, Personnel Training and Education Group, 1990.
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