MLA

Saarinen, Eero, 1910-1961. Architectural tracing; mechanical tracings; electrical; miscellaneous drawings, bulletins, addenda. Box 214. undated. https://collections.library.yale.edu/catalog/32218672.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 214"])(undated)[Architectural tracing; mechanical tracings; electrical; miscellaneous drawings, bulletins, addenda]. https://collections.library.yale.edu/catalog/32218672.