APA (7th ed.) Citation

Armitage, A. (1947). The world of Copernicus. The New American Library.

Chicago Style (17th ed.) Citation

Armitage, Angus. The World of Copernicus. New York: The New American Library, 1947.

MLA (9th ed.) Citation

Armitage, Angus. The World of Copernicus. The New American Library, 1947.

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