Printed form used by Captains during the Expedition: "Thomas Jefferson, President of the United States of America. From the powers vested in us and [blank] by the above authority: To all who shall see these presents, Greeting: Know ye, that from the special confience reposed by us in the sincere and unalterable attachment of chief of the [blank] NATION to the UNITED STATES...."
MLA
Clark, William, 1770-1838. Printed form used by Captains during the Expedition: "Thomas Jefferson, President of the United States of America. From the powers vested in us and [blank] by the above authority: To all who shall see these presents, Greeting: Know ye, that from the special confience reposed by us in the sincere and unalterable attachment of chief of the [blank] NATION to the UNITED STATES....". Box 2, folder 57r. circa 1803-1810. https://collections.library.yale.edu/catalog/2002511.
APA, 6th edition
Clark, William, 1770-1838. (["Box 2, folder 57r"])(circa 1803-1810)[Printed form used by Captains during the Expedition: "Thomas Jefferson, President of the United States of America. From the powers vested in us and [blank] by the above authority: To all who shall see these presents, Greeting: Know ye, that from the special confience reposed by us in the sincere and unalterable attachment of chief of the [blank] NATION to the UNITED STATES...."]. https://collections.library.yale.edu/catalog/2002511.