APA (7th ed.) Citation

Lewis, A., & Lewis, G. (1989). Alun Lewis: Letters to my wife. Seren Books.

Chicago Style (17th ed.) Citation

Lewis, Alun, and Gweno Lewis. Alun Lewis: Letters to My Wife. Bridgend: Seren Books, 1989.

MLA (9th ed.) Citation

Lewis, Alun, and Gweno Lewis. Alun Lewis: Letters to My Wife. Seren Books, 1989.