Παραπομπή APA

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.

Παραπομπή Chicago Style

Società italiana di fisica, International School of Physics "Enrico Fermi", και R. K. Sachs. General Relativity and Cosmology: Proceedings of the International School of Physics Enrico Fermi. New York: Academic Press, 1971.

Παραπομπή MLA

Società italiana di fisica, et al. General Relativity and Cosmology: Proceedings of the International School of Physics Enrico Fermi. Academic Press, 1971.