APA (7th ed.) Citation

Cowley, C. R. (1970). The theory of stellar spectra. Gordon and Breach.

Chicago Style (17th ed.) Citation

Cowley, Charles R. The Theory of Stellar Spectra. New York: Gordon and Breach, 1970.

MLA (9th ed.) Citation

Cowley, Charles R. The Theory of Stellar Spectra. Gordon and Breach, 1970.