MLA

Hansen, Bert, 1944-. "Sugar-Coated. Dr. Grover 'I've made that pill nice and pleasant for you. It's heavily coated with sugar'.". Box 6, folder 13. 1894 August 25. https://collections.library.yale.edu/catalog/32331475.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 6, folder 13"])(1894 August 25)["Sugar-Coated. Dr. Grover 'I've made that pill nice and pleasant for you. It's heavily coated with sugar'."]. https://collections.library.yale.edu/catalog/32331475.