Cite

Lewis's sketch-map of Vancouver's Island, Nootka Sound, etc.

MLA

Clark, William, 1770-1838. Lewis's sketch-map of Vancouver's Island, Nootka Sound, etc.. Box 2, folder 52. circa 1803-1810. https://collections.library.yale.edu/catalog/2002502.

APA, 6th edition

Clark, William, 1770-1838. (["Box 2, folder 52"])(circa 1803-1810)[Lewis's sketch-map of Vancouver's Island, Nootka Sound, etc.]. https://collections.library.yale.edu/catalog/2002502.