Boulders rolling down inside crater

Chicago citation style
Zoller, William. Boulders rolling down inside crater. 1982. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/mshchem/id/4. (Accessed October 17, 2018.)
APA citation style
Zoller, William, (1982) Boulders rolling down inside crater. Retrieved from the Digital Public Library of America, http://cdm16786.contentdm.oclc.org/cdm/ref/collection/mshchem/id/4
MLA citation style
Zoller, William. Retrieved from the Digital Public Library of America <http://cdm16786.contentdm.oclc.org/cdm/ref/collection/mshchem/id/4>.
Note: These citations are programmatically generated and may be incomplete.