Não informado. (1931). Physics: A journal of general and applied physics conducted by the American Physical Society. American Physical Society.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Physics: A Journal of General and Applied Physics Conducted by the American Physical Society. New York: American Physical Society, 1931.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Physics: A Journal of General and Applied Physics Conducted by the American Physical Society. American Physical Society, 1931.
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