Left to right: Gene E. Likens with the Keeling Family; Louise Keeling (wife); Andrew Keeling (son); Charles D. Keeling; and Ralph F. Keeling (son) after the two scientists had just received their National Medal of Science awards at the White House. June 13, 2002

Chicago citation style
Left to right: Gene E. Likens with the Keeling Family; Louise Keeling (wife); Andrew Keeling (son); Charles D. Keeling; and Ralph F. Keeling (son) after the two scientists had just received their National Medal of Science awards at the White House. June 13, 2002. 2002-06-13. Retrieved from the Digital Public Library of America, https://library.ucsd.edu/dc/object/bb8840843m. (Accessed December 17, 2018.)
APA citation style
(2002-06-13) Left to right: Gene E. Likens with the Keeling Family; Louise Keeling (wife); Andrew Keeling (son); Charles D. Keeling; and Ralph F. Keeling (son) after the two scientists had just received their National Medal of Science awards at the White House. June 13, 2002. Retrieved from the Digital Public Library of America, https://library.ucsd.edu/dc/object/bb8840843m
MLA citation style
Retrieved from the Digital Public Library of America <https://library.ucsd.edu/dc/object/bb8840843m>.
Note: These citations are programmatically generated and may be incomplete.