Não informado. (1976). Journal of Vocational Education Research. American Vocational Education Research Association.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Journal of Vocational Education Research. Madison, Wis: American Vocational Education Research Association, 1976.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Journal of Vocational Education Research. American Vocational Education Research Association, 1976.
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