Não informado. (1934). Journal of Research of the National Bureau of Standards. U.S. Department of Commerce, National Bureau of Standards.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Journal of Research of the National Bureau of Standards. Washington: U.S. Department of Commerce, National Bureau of Standards, 1934.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Journal of Research of the National Bureau of Standards. U.S. Department of Commerce, National Bureau of Standards, 1934.
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