The color of amethyst, rose, and blue varieties of quartz

Chicago citation style
Watson, Thomas L, Beard, R. E. The color of amethyst, rose, and blue varieties of quartz. 1917. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_86143&repo=DPLA. (Accessed November 16, 2018.)
APA citation style
Watson, Thomas L, Beard, R. E, (1917) The color of amethyst, rose, and blue varieties of quartz. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_86143&repo=DPLA
MLA citation style
Watson, Thomas L, Beard, R. E. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_86143&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.