Não informado. (1990). New Directions for Adult and Continuing Education. Jessey Bass Publishers.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. New Directions for Adult and Continuing Education. San Francisco, Calif: Jessey Bass Publishers, 1990.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. New Directions for Adult and Continuing Education. Jessey Bass Publishers, 1990.
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