MLA

Speck, William A. (William Alfred), 1864-1928. Jameson, Anna. Box 23. circa 1870-1927. https://collections.library.yale.edu/catalog/17271757.

APA, 6th edition

Speck, William A. (William Alfred), 1864-1928. (["Box 23"])(circa 1870-1927)[Jameson, Anna]. https://collections.library.yale.edu/catalog/17271757.