Cite

Postcard landscape [with clouds]

MLA

Steinberg, Saul, 1914-1999. Postcard landscape [with clouds]. Box 76, folder 1452. circa 1970s. https://collections.library.yale.edu/catalog/16855951.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 76, folder 1452"])(circa 1970s)[Postcard landscape [with clouds]]. https://collections.library.yale.edu/catalog/16855951.