APA (7th ed.) Citation

Hummel, C. A., & Quirrenbach, A. (1993). The spectroscopic binary eta Andromedae: Determination of the orbit by optical interferometry. The astronomical journal, 106(6), .

Chicago Style (17th ed.) Citation

Hummel, Christian A., and Andreas Quirrenbach. "The Spectroscopic Binary Eta Andromedae: Determination of the Orbit by Optical Interferometry." The Astronomical Journal 106, no. 6 (1993).

MLA (9th ed.) Citation

Hummel, Christian A., and Andreas Quirrenbach. "The Spectroscopic Binary Eta Andromedae: Determination of the Orbit by Optical Interferometry." The Astronomical Journal, vol. 106, no. 6, 1993.