MLA

Erdoes, Richard, 1912-2008. Schreyvogel, Remington, Etc.. Box 45 | Plains Indian History I. 1976-1985, undated. https://collections.library.yale.edu/catalog/10256511.

APA, 6th edition

Erdoes, Richard, 1912-2008. (["Box 45 | Plains Indian History I"])(1976-1985, undated)[Schreyvogel, Remington, Etc.]. https://collections.library.yale.edu/catalog/10256511.