MLA

Streeter, Edward Clark (1874-1947). Glass Flat-Bottomed Retort Flask. 19th century. https://collections.library.yale.edu/catalog/17321916.

APA, 6th edition

Streeter, Edward Clark (1874-1947). (19th century)[Glass Flat-Bottomed Retort Flask]. https://collections.library.yale.edu/catalog/17321916.