A revision of hymenopterous insects of the tribe Cremastini of American north of Mexico

Chicago citation style
Cushma, R. A. A revision of hymenopterous insects of the tribe Cremastini of American north of Mexico. 1917. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_86142&repo=DPLA. (Accessed November 21, 2018.)
APA citation style
Cushma, R. A, (1917) A revision of hymenopterous insects of the tribe Cremastini of American north of Mexico. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_86142&repo=DPLA
MLA citation style
Cushma, R. A. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_86142&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.