APA (7th ed.) Citation

Yerkes Observatory. (1891). University of Chicago, Yerkes Observatory, Office of the Director records.

Chicago Style (17th ed.) Citation

Yerkes Observatory. University of Chicago, Yerkes Observatory, Office of the Director Records. 1891.

MLA (8th ed.) Citation

Yerkes Observatory. University of Chicago, Yerkes Observatory, Office of the Director Records. 1891.

Warning: These citations may not always be 100% accurate.