APA (7th ed.) Citation

Keenan, P. C., & McNeil, R. C. (1976). An atlas of spectra of the cooler stars: Types G, K, M, S, and C. Ohio State University Press.

Chicago Style (17th ed.) Citation

Keenan, Philip C., and Raymond C. McNeil. An Atlas of Spectra of the Cooler Stars: Types G, K, M, S, and C. Columbus: Ohio State University Press, 1976.

MLA (9th ed.) Citation

Keenan, Philip C., and Raymond C. McNeil. An Atlas of Spectra of the Cooler Stars: Types G, K, M, S, and C. Ohio State University Press, 1976.