Cite

Route about May 19-24, 1805, and Lewis's route about July 31-August 1, 1806

MLA

Clark, William, 1770-1838. Route about May 19-24, 1805, and Lewis's route about July 31-August 1, 1806. Box 1, folder 24r. circa 1803-1810. https://collections.library.yale.edu/catalog/2002468.

APA, 6th edition

Clark, William, 1770-1838. (["Box 1, folder 24r"])(circa 1803-1810)[Route about May 19-24, 1805, and Lewis's route about July 31-August 1, 1806]. https://collections.library.yale.edu/catalog/2002468.