Osterbrock, D. E. (1997). Yerkes Observatory, 1892-1950: The birth, near death, and resurrection of a scientific research institution. University of Chicago Press.
Citace podle Chicago (17th ed.)Osterbrock, Donald E. Yerkes Observatory, 1892-1950: The Birth, Near Death, and Resurrection of a Scientific Research Institution. Chicago: University of Chicago Press, 1997.
Citace podle MLA (9th ed.)Osterbrock, Donald E. Yerkes Observatory, 1892-1950: The Birth, Near Death, and Resurrection of a Scientific Research Institution. University of Chicago Press, 1997.
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