APA (7th ed.) Citation

Llewellyn, R. D. V. L. (1939). How green was my valley. Michael Joseph.

Chicago Style (17th ed.) Citation

Llewellyn, Richard David Vivian Lloyd. How Green Was My Valley. London: Michael Joseph, 1939.

MLA (9th ed.) Citation

Llewellyn, Richard David Vivian Lloyd. How Green Was My Valley. Michael Joseph, 1939.