MLA

Elder, James (Merchant). Intended duty on Cape Madeira : James Elder with thanks to his friends for the encouragement given to the system adopted by him of selling a good article at a moderate price .... [11 March 1817]. https://collections.library.yale.edu/catalog/15960415.

APA, 6th edition

Elder, James (Merchant). ([11 March 1817])[Intended duty on Cape Madeira : James Elder with thanks to his friends for the encouragement given to the system adopted by him of selling a good article at a moderate price ...]. https://collections.library.yale.edu/catalog/15960415.