APA (7th ed.) Citation

Leonard, M., & Abdullah, M. (2011). Description of weightlessness and how astronauts prepare for it. Encyclopedia Britannica.

Chicago Style (17th ed.) Citation

Leonard, Melinda, and Mansur Abdullah. Description of Weightlessness and How Astronauts Prepare for It. Chicago, IL: Encyclopedia Britannica, 2011.

MLA (9th ed.) Citation

Leonard, Melinda, and Mansur Abdullah. Description of Weightlessness and How Astronauts Prepare for It. Encyclopedia Britannica, 2011.

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