MLA

Company, East India. Certificate of Engagment in the Service of the East India Company for Nathaniel Helly, 1769 November 13. 0AD. https://collections.library.yale.edu/catalog/11690522.

APA, 6th edition

Company, E. I. (0 C.E.). Certificate of engagment in the service of the East India Company for Nathaniel Helly, 1769 November 13. [Legal instruments]. https://collections.library.yale.edu/catalog/11690522.