Bullboats Crossings
MLA
Erdoes, Richard, 1912-2008. Bullboats Crossings. Box 45 | Plains Indian History I. 1971-1976, undated. https://collections.library.yale.edu/catalog/10256126.
APA, 6th edition
Erdoes, Richard, 1912-2008. (["Box 45 | Plains Indian History I"])(1971-1976, undated)[Bullboats Crossings]. https://collections.library.yale.edu/catalog/10256126.