APA (7th ed.) Citation

Adam Matthew Digital (Firm). (1940). Chefoo. [publisher not identified].

Chicago Style (17th ed.) Citation

Adam Matthew Digital (Firm). Chefoo. [Place of publication not identified]: [publisher not identified], 1940.

MLA (9th ed.) Citation

Adam Matthew Digital (Firm). Chefoo. [publisher not identified], 1940.