Cita APA (7a ed.)

Barnett, L., & Einstein, A. (1954). The Universe and Dr. Einstein (5th print.). The New American Library.

Cita Chicago Style (17a ed.)

Barnett, Lincoln, y Albert Einstein. The Universe and Dr. Einstein. 5th print. New York: The New American Library, 1954.

Cita MLA (9a ed.)

Barnett, Lincoln, y Albert Einstein. The Universe and Dr. Einstein. 5th print. The New American Library, 1954.