Crystal lake, Indian Echo Caverns, Hummelstown, Pa., near Harrisburg, Pa

Chicago citation style
Crystal lake, Indian Echo Caverns, Hummelstown, Pa., near Harrisburg, Pa. 1930-1945. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/gx41np22b. (Accessed June 24, 2018.)
APA citation style
(1930-1945) Crystal lake, Indian Echo Caverns, Hummelstown, Pa., near Harrisburg, Pa. Retrieved from the Digital Public Library of America, http://ark.digitalcommonwealth.org/ark:/50959/gx41np22b
MLA citation style
Retrieved from the Digital Public Library of America <http://ark.digitalcommonwealth.org/ark:/50959/gx41np22b>.
Note: These citations are programmatically generated and may be incomplete.