APA (7th ed.) Citation

Llewellyn, R. (1940). How green was my valley. The Macmillan company.

Chicago Style (17th ed.) Citation

Llewellyn, Richard. How Green Was My Valley. New York: The Macmillan company, 1940.

MLA (9th ed.) Citation

Llewellyn, Richard. How Green Was My Valley. The Macmillan company, 1940.