Cite

This Book is a Part of the Library of George R. Cowgill, Yale University, New Haven, Conn.

MLA

Cowgill, George Raymond, 1893-1973. This Book is a Part of the Library of George R. Cowgill, Yale University, New Haven, Conn.. 20th century. https://collections.library.yale.edu/catalog/16788831.

APA, 6th edition

Cowgill, George Raymond, 1893-1973. (20th century)[This Book is a Part of the Library of George R. Cowgill, Yale University, New Haven, Conn.]. https://collections.library.yale.edu/catalog/16788831.