APA (7th ed.) Citation

Hagen, J. G. (1908). Nicolaus Copernicus.

Chicago Style (17th ed.) Citation

Hagen, John G. Nicolaus Copernicus. 1908.

MLA (9th ed.) Citation

Hagen, John G. Nicolaus Copernicus. 1908.

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