MLA

Steinberg, Saul, 1914-1999. Arte, Adrien Maeght. Box 3, folder 47. 1966–1976. https://collections.library.yale.edu/catalog/10055110.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 3, folder 47"])(1966–1976)[Arte, Adrien Maeght]. https://collections.library.yale.edu/catalog/10055110.