MLA

Willm. Sterck, Watch and Clock Maker in Pulteney Street near Golden Square [Graphic]. Willm. Sterck, 0AD. https://collections.library.yale.edu/catalog/16830626.

APA, 6th edition

Willm. Sterck, watch and clock maker in Pulteney Street near Golden Square [graphic]. (0 C.E.). [Advertisements, Trade cards (advertising), Ephemera, Engravings England London 1757]. Willm. Sterck. https://collections.library.yale.edu/catalog/16830626.