Sri Lankan gem pit diggers at gravel pit in Sri Lanka.

Chicago citation style
Sri Lankan gem pit diggers at gravel pit in Sri Lanka.. 1978. Retrieved from the Digital Public Library of America, http://dla.library.upenn.edu/dla/wheeler/image.html?id=WHEELER_MBWSL1000013. (Accessed December 14, 2018.)
APA citation style
(1978) Sri Lankan gem pit diggers at gravel pit in Sri Lanka.. Retrieved from the Digital Public Library of America, http://dla.library.upenn.edu/dla/wheeler/image.html?id=WHEELER_MBWSL1000013
MLA citation style
Retrieved from the Digital Public Library of America <http://dla.library.upenn.edu/dla/wheeler/image.html?id=WHEELER_MBWSL1000013>.
Note: These citations are programmatically generated and may be incomplete.