APA (7th ed.) Citation

Hale, G. E. (1931). Signals from the stars. C. Scribner's sons.

Chicago Style (17th ed.) Citation

Hale, George Ellery. Signals from the Stars. New York, London: C. Scribner's sons, 1931.

MLA (9th ed.) Citation

Hale, George Ellery. Signals from the Stars. C. Scribner's sons, 1931.