MLA

Carson, Rachel, 1907-1964. Canada: Department of Agriculture. Box 42, folder 770. 1961-62. https://collections.library.yale.edu/catalog/17145174.

APA, 6th edition

Carson, Rachel, 1907-1964. (["Box 42, folder 770"])(1961-62)[Canada: Department of Agriculture]. https://collections.library.yale.edu/catalog/17145174.