MLA

of Commissioners for Foreign Missions, American Board. Annual Report of the American Board of Commissioners for Foreign Missions, v. 111 (1920-1921). American Board of Commissioners for Foreign Missions, 1920. https://collections.library.yale.edu/catalog/11671282.

APA, 6th edition

of Commissioners for Foreign Missions, A. B. (1920). Annual Report of the American Board of Commissioners for Foreign Missions, v. 111 (1920-1921). American Board of Commissioners for Foreign Missions. https://collections.library.yale.edu/catalog/11671282.