Società italiana di fisica, International School of Physics "Enrico Fermi", & Sachs, R. K. (1971). General relativity and cosmology: Proceedings of the International School of Physics Enrico Fermi. Academic Press.
শিকাগো স্টাইলে সাইটেশনSocietà italiana di fisica, International School of Physics "Enrico Fermi", এবং R. K. Sachs. General Relativity and Cosmology: Proceedings of the International School of Physics Enrico Fermi. New York: Academic Press, 1971.
এমএলএ সাইটেশনSocietà italiana di fisica, et al. General Relativity and Cosmology: Proceedings of the International School of Physics Enrico Fermi. Academic Press, 1971.
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