APA (7th ed.) Citation

Williams, G. A. (1988). When was Wales?: A history of the Welsh (Reprint.). Penguin Books.

Chicago Style (17th ed.) Citation

Williams, Gwyn A. When Was Wales?: A History of the Welsh. Reprint. Harmondsworth: Penguin Books, 1988.

MLA (9th ed.) Citation

Williams, Gwyn A. When Was Wales?: A History of the Welsh. Reprint. Penguin Books, 1988.