MLA

Bailey & Sons, Organ Builders, Harpsicord and Spinnette Makers [...] [Graphic]. Bailey & Sons, 0AD. https://collections.library.yale.edu/catalog/16830806.

APA, 6th edition

Bailey & Sons, organ builders, harpsicord and spinnette makers [...] [graphic]. (0 C.E.). [Advertisements, Trade cards (advertising), Ephemera, Engravings England London 1757]. Bailey & Sons. https://collections.library.yale.edu/catalog/16830806.