Whelan, P. (2017). Gravity. Smartbook Media Inc.
https://learn.openlightbox.com/TASubscription/92fe5023-7012-4c62-a2bf-77a2d5dd0963/9081e918-aca7-4d85-8f61-2ac49ebd27ee/5/2488
The Chicago Manual of Style (Chicago)
Whelan, Piper. Gravity. What Shapes the Earth?. New York: Smartbook Media Inc., 2017,
https://learn.openlightbox.com/TASubscription/92fe5023-7012-4c62-a2bf-77a2d5dd0963/9081e918-aca7-4d85-8f61-2ac49ebd27ee/5/2488. Accessed
18 Jan. 2026.
The Modern Language Association of America (MLA)
Whelan, Piper. Gravity. Smartbook Media Inc., 2017. What Shapes the Earth?. Lightbox Nonfiction Subscription,
https://learn.openlightbox.com/TASubscription/92fe5023-7012-4c62-a2bf-77a2d5dd0963/9081e918-aca7-4d85-8f61-2ac49ebd27ee/5/2488.
