MLA

Ducher et Cie, Lemercier at Cie, and Leveil. Palais Du Trocodero. Consolidation Des Carrieres. Pl. 2-3. 0AD. https://collections.library.yale.edu/catalog/2021566.

APA, 6th edition

Ducher et Cie, L. at C., & L. (0 C.E.). Palais du Trocodero. Consolidation des carrieres. pl. 2-3 [Architectural drawings, Building plans, Engravings, Prints (Visual works)]. https://collections.library.yale.edu/catalog/2021566.