An open door for singers; hints to vocalists

Chicago citation style
Herman, Reinhold Ludwig, 1849-1919. An open door for singers; hints to vocalists. [1912]. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/008695532. (Accessed November 19, 2018.)
APA citation style
Herman, Reinhold Ludwig, 1849-1919, ([1912]) An open door for singers; hints to vocalists. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/008695532
MLA citation style
Herman, Reinhold Ludwig, 1849-1919. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/008695532>.
Note: These citations are programmatically generated and may be incomplete.