APA (7th ed.) Citation

Tolstoy, L. (1964). Childhood, boyhood, youth. Penguin Books.

Chicago Style (17th ed.) Citation

Tolstoy, Leo. Childhood, Boyhood, Youth. Harmondsworth, Mddx.: Penguin Books, 1964.

MLA (8th ed.) Citation

Tolstoy, Leo. Childhood, Boyhood, Youth. Penguin Books, 1964.