MLA

Hansen, Bert, 1944-. "An Anxious Christmas Morning. Waiting for the doctor's verdict--whether it shall be a day of gladness or sorrow.". Box 2, folder 40. 1901 December 19. https://collections.library.yale.edu/catalog/32329337.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 2, folder 40"])(1901 December 19)["An Anxious Christmas Morning. Waiting for the doctor's verdict--whether it shall be a day of gladness or sorrow."]. https://collections.library.yale.edu/catalog/32329337.