MLA

Kilpatrick, Jack Frederick. Letters and Notes Including Practice in English and Latin Writing, 8 Pages, Accompanied by an Envelope. 1934. https://collections.library.yale.edu/catalog/15491761.

APA, 6th edition

Kilpatrick, J. F. (1934). Letters and notes including practice in English and Latin writing, 8 pages, accompanied by an envelope. https://collections.library.yale.edu/catalog/15491761.