APA (7th ed.) Citation

Gilbert, W., & Galilei, G. (1990). On the loadstone and magnetic bodies Great books of the Western world.

Chicago Style (17th ed.) Citation

Gilbert, William, and Galileo Galilei. "On the Loadstone and Magnetic Bodies." Great Books of the Western World 1990.

MLA (9th ed.) Citation

Gilbert, William, and Galileo Galilei. "On the Loadstone and Magnetic Bodies." Great Books of the Western World, 1990.

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