Παραπομπή APA

Sachs, R. K. (1971). General relativity and cosmology =: Relativita generale e cosmolgia. New York: Academic Press.

Παραπομπή Chicago Style

Sachs, R. K. General Relativity and Cosmology =: Relativita Generale E Cosmolgia. New York: Academic Press, 1971.

Παραπομπή MLA

Sachs, R. K. General Relativity and Cosmology =: Relativita Generale E Cosmolgia. New York: Academic Press, 1971.

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