MLA

True, Solomon, Jr. Journal of a Voyage from Boston to California, 1849-1850 / by Solomon True, Jr. 1849. https://collections.library.yale.edu/catalog/11703161.

APA, 6th edition

True, S., Jr. (1849). Journal of a voyage from Boston to California, 1849-1850 / by Solomon True, Jr. [Annotations, Business records, Manuscripts, Marginalia, Maritime journals]. https://collections.library.yale.edu/catalog/11703161.