Franklin

MLA

Gray, R. O, C. J Corbally, and Adam Burgasser. Stellar Spectral Classification. Princeton, N.J.: Princeton University Press, 2009.

APA

Gray, R. O, Corbally, C. J, & Burgasser, A. (2009). Stellar spectral classification. Princeton, N.J.: Princeton University Press.

Chicago

Gray, R. O., C. J Corbally, and Adam Burgasser. Stellar Spectral Classification. Princeton, N.J.: Princeton University Press, 2009.