APA (7th ed.) Citation

Sobel, D. (2011). A more perfect heaven: How Nicolaus Copernicus revolutionized the cosmos (1st U.S. ed.). Walker.

Chicago Style (17th ed.) Citation

Sobel, Dava. A More Perfect Heaven: How Nicolaus Copernicus Revolutionized the Cosmos. 1st U.S. ed. New York: Walker, 2011.

MLA (8th ed.) Citation

Sobel, Dava. A More Perfect Heaven: How Nicolaus Copernicus Revolutionized the Cosmos. 1st U.S. ed. Walker, 2011.

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