MLA

Judson, Miriam Ruth McCandliss, 1893-1960. "A Short Sketch of the Hospital for the Insane" by John G. Kerr; "A Trip to Linchow" by Arthur Carson. 3, folder 51. 1912, n.d.. https://collections.library.yale.edu/catalog/33382603.

APA, 6th edition

Judson, Miriam Ruth McCandliss, 1893-1960. (["3, folder 51"])(1912, n.d.)["A Short Sketch of the Hospital for the Insane" by John G. Kerr; "A Trip to Linchow" by Arthur Carson]. https://collections.library.yale.edu/catalog/33382603.