MLA

Erdoes, Richard, 1912-2008. San Christobal Market. Box 44 | Mexico 1980. Yucatan. 1980, undated. https://collections.library.yale.edu/catalog/10254485.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 44 | Mexico 1980. Yucatan"])(1980, undated)[San Christobal Market]. https://collections.library.yale.edu/catalog/10254485.