MLA

Printers, Pynson. The Colophon. Pynson Printers Incorporated,, The Colophon Ltd., 1931. https://collections.library.yale.edu/catalog/12191506.

APA, 6th edition

Printers, P. (1931). The Colophon. [Historiography, Periodicals, private collections (AAT)]. Pynson Printers Incorporated,, The Colophon Ltd. https://collections.library.yale.edu/catalog/12191506.