MLA

Carson, Rachel, 1907-1964. Leukemia. Box 34, folder 618. 1946-51. https://collections.library.yale.edu/catalog/17145168.

APA, 6th edition

Carson, Rachel, 1907-1964. (["Box 34, folder 618"])(1946-51)[Leukemia]. https://collections.library.yale.edu/catalog/17145168.