Cite

Robert Free on horseback, center. Syd Mills on horseback, right.

MLA

Luck, Owen Craig, 1947-. Robert Free on horseback, center. Syd Mills on horseback, right.. Box 1. 1973. https://collections.library.yale.edu/catalog/15817677.

APA, 6th edition

Luck, Owen Craig, 1947-. (["Box 1"])(1973)[Robert Free on horseback, center. Syd Mills on horseback, right.]. https://collections.library.yale.edu/catalog/15817677.