APA (7th ed.) Citation

National Geographic Society (U.S.) & Goldberg, S. (2021). The 21st century: Photographs from the image collection. National Geographic.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.) and Susan Goldberg. The 21st Century: Photographs from the Image Collection. Washington, D.C.: National Geographic, 2021.

MLA (8th ed.) Citation

National Geographic Society (U.S.) and Susan Goldberg. The 21st Century: Photographs from the Image Collection. National Geographic, 2021.

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