APA (7th ed.) Citation

Tolstoi, L. G. (1952). War and peace. Enciclopaedia Britannica.

Chicago Style (17th ed.) Citation

Tolstoi, León Graf. War and Peace. Chicago: Enciclopaedia Britannica, 1952.

MLA (9th ed.) Citation

Tolstoi, León Graf. War and Peace. Enciclopaedia Britannica, 1952.