↑ pp. 60, 134, The Analysis of Starlight: One Hundred and Fifty Years of Astronomical Spectroscopy, J. B. Hearnshaw, Cambridge, UK: Cambridge University Press, 1986, ISBN 0-521-25548-1.
↑ pp. 62–63, Stars and Their Spectra: An Introduction to the Spectral Sequence, James B. Kaler, Cambridge: Cambridge University Press, 1997, ISBN 0-521-58570-8.
↑ The Guinness book of astronomy facts & feats, Patrick Moore, 1992, 0-900424-76-1
↑ "The Colour of Stars". Australia Telescope Outreach and Education. 2004-12-21. สืบค้นเมื่อ 2007-09-26. — Explains the reason for the difference in color perception.
↑ LeDrew, G.; The Real Starry Sky, Journal of the Royal Astronomical Society of Canada, Vol. 95, No. 1 (whole No. 686, February 2001), pp. 32–33 - Note Table 2 has an error and so this article will use 824 as the assumed correct total of main sequence stars
