Asphaug, E. (2019). When the Earth had two moons: Cannibal planets, icy giants, dirty comets, dreadful orbits, and the origins of the night sky (First edition.). Custom House.
Chicago Style (17th ed.) CitationAsphaug, Erik. When the Earth Had Two Moons: Cannibal Planets, Icy Giants, Dirty Comets, Dreadful Orbits, and the Origins of the Night Sky. First edition. New York: Custom House, 2019.
MLA (9th ed.) CitationAsphaug, Erik. When the Earth Had Two Moons: Cannibal Planets, Icy Giants, Dirty Comets, Dreadful Orbits, and the Origins of the Night Sky. First edition. Custom House, 2019.
Warning: These citations may not always be 100% accurate.