MLA

Library, Yale University. The Decoration of the Sterling Memorial Library : Symbolic and Illustrative Ornament. Yale University Library, 1931. https://collections.library.yale.edu/catalog/10108606.

APA, 6th edition

Library, Y. U. (1931). The Decoration of the Sterling Memorial Library : symbolic and illustrative ornament [Halftones, Historiography, illustrations (AAT), Photomechanical prints]. Yale University Library, https://collections.library.yale.edu/catalog/10108606.