Cite

Hapgood, Fred, "Preface," typescript photocopy

MLA

DeWitt, Miriam Hapgood, 1906-1990. Hapgood, Fred, "Preface," typescript photocopy. Box 25, folder 340. undated. https://collections.library.yale.edu/catalog/17359123.

APA, 6th edition

DeWitt, Miriam Hapgood, 1906-1990. (["Box 25, folder 340"])(undated)[Hapgood, Fred, "Preface," typescript photocopy]. https://collections.library.yale.edu/catalog/17359123.