Children in costumes are gathered for a youth event in Pacific Palisades, Calif

Chicago citation style
Children in costumes are gathered for a youth event in Pacific Palisades, Calif. 1950. Retrieved from the Digital Public Library of America, http://digital.smpl.org/cdm/ref/collection/palisades/id/1103. (Accessed December 18, 2018.)
APA citation style
(1950) Children in costumes are gathered for a youth event in Pacific Palisades, Calif. Retrieved from the Digital Public Library of America, http://digital.smpl.org/cdm/ref/collection/palisades/id/1103
MLA citation style
Retrieved from the Digital Public Library of America <http://digital.smpl.org/cdm/ref/collection/palisades/id/1103>.
Note: These citations are programmatically generated and may be incomplete.