MLA

Heliopolis Basilica, Egypt, Ca. 1920-1940. 1920. https://collections.library.yale.edu/catalog/11444990.

APA, 6th edition

Heliopolis Basilica, Egypt, ca. 1920-1940. (1920). [Exterior views (AAT), photographic postcards (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11444990.