MLA

Erdoes, Richard, 1912-2008. Tipi Exterior. Box 42 | Plains Indians, Housing, Landscapes, Personal Pix, Ecology [Plains, Landscapes, Houses, Tipis, Strip Mining / Sioux Housing Scapes]. 1971-1990, undated. https://collections.library.yale.edu/catalog/2108379.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 42 | Plains Indians, Housing, Landscapes, Personal Pix, Ecology [Plains, Landscapes, Houses, Tipis, Strip Mining / Sioux Housing Scapes]"])(1971-1990, undated)[Tipi Exterior]. https://collections.library.yale.edu/catalog/2108379.