Mount St. Helens from south showing steam coming out from top of crater in 1981

Chicago citation style
Zoller, William. Mount St. Helens from south showing steam coming out from top of crater in 1981. 1981. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/mshchem/id/66. (Accessed July 20, 2018.)
APA citation style
Zoller, William, (1981) Mount St. Helens from south showing steam coming out from top of crater in 1981. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/mshchem/id/66
MLA citation style
Zoller, William. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/mshchem/id/66>.
Note: These citations are programmatically generated and may be incomplete.