APA (7th ed.) Citation

Armitage, A. (1951). The world of Copernicus. New American Library.

Chicago Style (17th ed.) Citation

Armitage, Angus. The World of Copernicus. New York: New American Library, 1951.

MLA (9th ed.) Citation

Armitage, Angus. The World of Copernicus. New American Library, 1951.

Warning: These citations may not always be 100% accurate.