MLA

Asakawa, Kan'ichi, 1873-1948. Booth, ______. Box 4, folder 40 - 41 | reel 3U. 1906-1926. https://collections.library.yale.edu/catalog/32482558.

APA, 6th edition

Asakawa, Kan'ichi, 1873-1948. (["Box 4, folder 40 - 41 | reel 3U"])(1906-1926)[Booth, ______]. https://collections.library.yale.edu/catalog/32482558.