Portrait U.S.A. The First Color Photomosaic of the 48 Contiguous United States. Produced by the National Geographic Society. With the LANDSAT Imagery of the National Aeronautics and Space Administration Through the Photographic and Mosaic Facilities of the General Electric Company, Beltsville Photographic Engineering LaboratoryPortrait U.S.A. The First Color Photomosaic of the 48 Contiguous United States. Produced by the National Geographic Society. With the LANDSAT Imagery of the National Aeronautics and Space Administration Through the Photographic and Mosaic Facilities of the General Electric Company, Beltsville Photographic Engineering Laboratory. The United StatesPortrait U.S.A. The First Color Photomosaic of the 48 Contiguous United States

Chicago citation style
Cartographic Division, National Geographic Society. Portrait U.S.A. The First Color Photomosaic of the 48 Contiguous United States. Produced by the National Geographic Society. With the LANDSAT Imagery of the National Aeronautics and Space Administration Through the Photographic and Mosaic Facilities of the General Electric Company, Beltsville Photographic Engineering Laboratory,Portrait U.S.A. The First Color Photomosaic of the 48 Contiguous United States. Produced by the National Geographic Society. With the LANDSAT Imagery of the National Aeronautics and Space Administration Through the Photographic and Mosaic Facilities of the General Electric Company, Beltsville Photographic Engineering Laboratory. The United States,Portrait U.S.A. The First Color Photomosaic of the 48 Contiguous United States. 1976. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~290753~90062349. (Accessed December 18, 2018.)
APA citation style
Cartographic Division, National Geographic Society, (1976) Portrait U.S.A. The First Color Photomosaic of the 48 Contiguous United States. Produced by the National Geographic Society. With the LANDSAT Imagery of the National Aeronautics and Space Administration Through the Photographic and Mosaic Facilities of the General Electric Company, Beltsville Photographic Engineering Laboratory,Portrait U.S.A. The First Color Photomosaic of the 48 Contiguous United States. Produced by the National Geographic Society. With the LANDSAT Imagery of the National Aeronautics and Space Administration Through the Photographic and Mosaic Facilities of the General Electric Company, Beltsville Photographic Engineering Laboratory. The United States,Portrait U.S.A. The First Color Photomosaic of the 48 Contiguous United States. Retrieved from the Digital Public Library of America, https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~290753~90062349
MLA citation style
Cartographic Division, National Geographic Society. Retrieved from the Digital Public Library of America <https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~290753~90062349>.
Note: These citations are programmatically generated and may be incomplete.