Request for a change in article 40 of the code ZN(S)2250

Chicago citation style
Pettibone, Marian H. Request for a change in article 40 of the code ZN(S)2250. 1981. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_14640&repo=DPLA. (Accessed December 16, 2018.)
APA citation style
Pettibone, Marian H, (1981) Request for a change in article 40 of the code ZN(S)2250. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_14640&repo=DPLA
MLA citation style
Pettibone, Marian H. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_14640&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.