Otis group intelligence scale. Manual of directions for primary and advanced examinations

Chicago citation style
Otis, Arthur S. (Arthur Sinton), 1886-1964. Otis group intelligence scale. Manual of directions for primary and advanced examinations. [c1921]. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/012407564. (Accessed November 13, 2018.)
APA citation style
Otis, Arthur S. (Arthur Sinton), 1886-1964, ([c1921]) Otis group intelligence scale. Manual of directions for primary and advanced examinations. Retrieved from the Digital Public Library of America, http://catalog.hathitrust.org/Record/012407564
MLA citation style
Otis, Arthur S. (Arthur Sinton), 1886-1964. Retrieved from the Digital Public Library of America <http://catalog.hathitrust.org/Record/012407564>.
Note: These citations are programmatically generated and may be incomplete.