APA (7th ed.) Citation

Andersen, H. C. (1840). The story of the ugly little duck. [publisher not identified].

Chicago Style (17th ed.) Citation

Andersen, H. C. The Story of the Ugly Little Duck. [Place of publication not identified]: [publisher not identified], 1840.

MLA (9th ed.) Citation

Andersen, H. C. The Story of the Ugly Little Duck. [publisher not identified], 1840.