APA (7th ed.) Citation

Jones, D., Hayward, W., & Wilcockson, C. (1979). Letters to William Hayward. Agenda Editions.

Chicago Style (17th ed.) Citation

Jones, David, William Hayward, and Colin Wilcockson. Letters to William Hayward. London: Agenda Editions, 1979.

MLA (9th ed.) Citation

Jones, David, et al. Letters to William Hayward. Agenda Editions, 1979.