MLA

Carl Zeiss, Harrison, Ross G. (Ross Granville), 1870-1959. Zeichenapparat Nach Abbe. Box 006. late 19th century. https://collections.library.yale.edu/catalog/17318781.

APA, 6th edition

Carl Zeiss, & Harrison, Ross G. (Ross Granville), 1870-1959. (["Box 006"])(late 19th century)[Zeichenapparat Nach Abbe]. https://collections.library.yale.edu/catalog/17318781.