Cite

Opium balls to be burned, Pootung, China, ca. 1921

MLA

Barbour, Margaret Hart. Opium Balls to Be Burned, Pootung, China, Ca. 1921. 1921. https://collections.library.yale.edu/catalog/11420963.

APA, 6th edition

Barbour, M. H. (1921). Opium balls to be burned, Pootung, China, ca. 1921 [General views (AAT), photographs (AAT)]. https://collections.library.yale.edu/catalog/11420963.