National Geographic Society (U.S.). (2015). An uncommon history of common things, Volume 2. National Geographic.
Lua i Stíl Chicago (17ú heag.)National Geographic Society (U.S.). An Uncommon History of Common Things, Volume 2. Washington, District of Columbia: National Geographic, 2015.
Lua MLA (9ú heag.)National Geographic Society (U.S.). An Uncommon History of Common Things, Volume 2. National Geographic, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.