Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

Gray, R. O., et al. Stellar Spectral Classification. Princeton University Press, 2009.