Cita APA (7a ed.)
Einstein, A., & Buchwald, D. The Collected Papers of Albert Einstein: The Berlin Years : Correspondence, May-December 1920, and Supplementary Correspondence, 1909-1920. Princeton University.
Cita estilo Chicago (17a ed.)
Einstein, Albert, y Diana Buchwald. The Collected Papers of Albert Einstein: The Berlin Years : Correspondence, May-December 1920, and Supplementary Correspondence, 1909-1920. Princeton, EUA: Princeton University.
Cita MLA (9a ed.)
Einstein, Albert, y Diana Buchwald. The Collected Papers of Albert Einstein: The Berlin Years : Correspondence, May-December 1920, and Supplementary Correspondence, 1909-1920. Princeton University.
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