APA (7th ed.) Citation

Le Danois, E. (1956). Poissons. [publisher not identified].

Chicago Style (17th ed.) Citation

Le Danois, Edouard. Poissons. Paris: [publisher not identified], 1956.

MLA (9th ed.) Citation

Le Danois, Edouard. Poissons. [publisher not identified], 1956.