APA (7th ed.) Citation

Galilei, G., & Scheiner, C. (2010). On Sunspots. University of Chicago Press.

Chicago Style (17th ed.) Citation

Galilei, Galileo, and Christophorus Scheiner. On Sunspots. Chicago: University of Chicago Press, 2010.

MLA (9th ed.) Citation

Galilei, Galileo, and Christophorus Scheiner. On Sunspots. University of Chicago Press, 2010.

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