Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Gray, Richard O., y Christopher J. Corbally. Stellar Spectral Classification. Princeton, N. J.: Princeton University Press, 2009.

Cita MLA (8a ed.)

Gray, Richard O., y Christopher J. Corbally. Stellar Spectral Classification. Princeton University Press, 2009.