APA (7th ed.) Citation

Gilbert, W. J., Galilei, G., & Harvey, W. (1952). On the loadstone and magnetic bodies. Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

Gilbert, William J., Galileo Galilei, and William Harvey. On the Loadstone and Magnetic Bodies. Chicago [etc.]: Encyclopaedia Britannica, 1952.

MLA (9th ed.) Citation

Gilbert, William J., et al. On the Loadstone and Magnetic Bodies. Encyclopaedia Britannica, 1952.