MLA

Linton, W. J. (William James), 1812-1897. "Theodore Parker on The Christian Religion, Atheism and Theism…abridged by W. J. Linton". Box 3, folder 156. undated. https://collections.library.yale.edu/catalog/17327105.

APA, 6th edition

Linton, W. J. (William James), 1812-1897. (["Box 3, folder 156"])(undated)["Theodore Parker on The Christian Religion, Atheism and Theism…abridged by W. J. Linton"]. https://collections.library.yale.edu/catalog/17327105.