Lifeguard manual for beach and pool safety

Chicago citation style
Chicago Park District (Ill.). Lifeguard manual for beach and pool safety. c1941]. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/001628441. (Accessed November 20, 2018.)
APA citation style
Chicago Park District (Ill.), (c1941]) Lifeguard manual for beach and pool safety. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/001628441
MLA citation style
Chicago Park District (Ill.). Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/001628441>.
Note: These citations are programmatically generated and may be incomplete.