MLA

Le Loup, Antoine, 1730-, artist. Vûe de la place de Spa et la fontaine minerale du pouhon [art original]. [1767]. https://collections.library.yale.edu/catalog/16193689.

APA, 6th edition

Le Loup, Antoine, 1730-, artist. ([1767])[Vûe de la place de Spa et la fontaine minerale du pouhon [art original]]. https://collections.library.yale.edu/catalog/16193689.