The variation of the milk of Ayrshire cows in quantity and fat content of their milk /

Chicago citation style
Pearl, Raymond, 1879-1940. The variation of the milk of Ayrshire cows in quantity and fat content of their milk /. 1919. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/100596047. (Accessed November 18, 2018.)
APA citation style
Pearl, Raymond, 1879-1940, (1919) The variation of the milk of Ayrshire cows in quantity and fat content of their milk /. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/100596047
MLA citation style
Pearl, Raymond, 1879-1940. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/100596047>.
Note: These citations are programmatically generated and may be incomplete.