APA (7th ed.) Citation

Smart, W. M., & Green, R. M. (1977). Textbook on spherical astronomy (6th rev. ed. / R.M. Green.). The University Press.

Chicago Style (17th ed.) Citation

Smart, W. M., and R. M. Green. Textbook on Spherical Astronomy. 6th rev. ed. / R.M. Green. Cambridge: The University Press, 1977.

MLA (9th ed.) Citation

Smart, W. M., and R. M. Green. Textbook on Spherical Astronomy. 6th rev. ed. / R.M. Green. The University Press, 1977.