Cite

Drawing, "The Keys of Calais," by William Blake; watercolor and ink on paper

MLA

Blake, William, 1757-1827. Drawing, "The Keys of Calais," by William Blake; watercolor and ink on paper. Box 1, folder 9. circa 1780, 1957. https://collections.library.yale.edu/catalog/10468078.

APA, 6th edition

Blake, William, 1757-1827. (["Box 1, folder 9"])(circa 1780, 1957)[Drawing, "The Keys of Calais," by William Blake; watercolor and ink on paper]. https://collections.library.yale.edu/catalog/10468078.