Europe Year 3000
MLA
Steinberg, Saul, 1914-1999. Europe Year 3000. Box 432, folder 5905. circa 1980. https://collections.library.yale.edu/catalog/11702638.
APA, 6th edition
Steinberg, Saul, 1914-1999. (["Box 432, folder 5905"])(circa 1980)[Europe Year 3000]. https://collections.library.yale.edu/catalog/11702638.