APA (7th ed.) Citation

Cooper, W. A., & Walker, E. N. (1989). Getting the measure of the stars. A. Hilger.

Chicago Style (17th ed.) Citation

Cooper, W. A., and E. N. Walker. Getting the Measure of the Stars. Bristol [England]: A. Hilger, 1989.

MLA (9th ed.) Citation

Cooper, W. A., and E. N. Walker. Getting the Measure of the Stars. A. Hilger, 1989.