Shed, cold-frames, and greenhouse

Chicago citation style
Unknown. Shed, cold-frames, and greenhouse. 1920's. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p16002coll19/id/643. (Accessed December 18, 2018.)
APA citation style
Unknown, (1920's) Shed, cold-frames, and greenhouse. Retrieved from the Digital Public Library of America, http://digital.library.temple.edu/cdm/ref/collection/p16002coll19/id/643
MLA citation style
Unknown. Retrieved from the Digital Public Library of America <http://digital.library.temple.edu/cdm/ref/collection/p16002coll19/id/643>.
Note: These citations are programmatically generated and may be incomplete.