MLA

Saarinen, Eero, 1910-1961. Memo book, passports, driving licenses, membership cards, printed memorabilia, wallet. Box 5, folder 42. 1929-1964, undated. https://collections.library.yale.edu/catalog/10015065.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 5, folder 42"])(1929-1964, undated)[Memo book, passports, driving licenses, membership cards, printed memorabilia, wallet]. https://collections.library.yale.edu/catalog/10015065.