MLA

Atkins, Anna, 1799-1871, photographer. Cyanotypes. [between 1845 and 1861]. https://collections.library.yale.edu/catalog/33340516.

APA, 6th edition

Atkins, Anna, 1799-1871, photographer. ([between 1845 and 1861])[Cyanotypes]. https://collections.library.yale.edu/catalog/33340516.