MLA

Walker, James, approximately 1748-approximately 1822, printmaker, publisher. Aleksandr pervyĭ Imperator i Samoderzhet︠s︡ Vserossiĭskiĭ Alexander the First Emperor and Autocrater of all the Russias / [graphic] =. [1 May 1803]. https://collections.library.yale.edu/catalog/33329030.

APA, 6th edition

Walker, James, approximately 1748-approximately 1822, printmaker, publisher. ([1 May 1803])[Aleksandr pervyĭ Imperator i Samoderzhet︠s︡ Vserossiĭskiĭ Alexander the First Emperor and Autocrater of all the Russias / [graphic] =]. https://collections.library.yale.edu/catalog/33329030.