MLA

Hansen, Bert, 1944-. “A Picture for the Foes of Sunday Concerts: the Clergyman's Leisure and the Poor Man's Holiday.”. Box 9, folder 14. 1884 July 23. https://collections.library.yale.edu/catalog/32326670.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 9, folder 14"])(1884 July 23)[“A Picture for the Foes of Sunday Concerts: the Clergyman's Leisure and the Poor Man's Holiday.”]. https://collections.library.yale.edu/catalog/32326670.