MLA

Christman, Enos, 1828-1912. Going to California in 1849 by E. L. Christman. Box 1 | Folder Moving to California in 1849 by E. L. Christman . 1849 April 9. https://collections.library.yale.edu/catalog/11692680.

APA, 6th edition

Christman, Enos, 1828-1912. (["Box 1 | Folder Moving to California in 1849 by E. L. Christman "])(1849 April 9)[Going to California in 1849 by E. L. Christman]. https://collections.library.yale.edu/catalog/11692680.