MLA

Gibbons, Sandra, 1982-, artist. A PIANO. Box 1 | Folder 19. 2011. https://collections.library.yale.edu/catalog/16068733.

APA, 6th edition

Gibbons, Sandra, 1982-, artist. (["Box 1 | Folder 19"])(2011)[A PIANO]. https://collections.library.yale.edu/catalog/16068733.