MLA

Erdoes, Richard, 1912-2008. "Cloud Dance Medium". Box 59. 1977. https://collections.library.yale.edu/catalog/2086622.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 59"])(1977)["Cloud Dance Medium"]. https://collections.library.yale.edu/catalog/2086622.