APA (7th ed.) Citation

Powys, L., Hopkins, K., & Blackmore, R. L. Advice to a young poet: The correspondence between Llewelyn Powys and Kenneth Hopkins.

Chicago Style (17th ed.) Citation

Powys, Llewelyn, Kenneth Hopkins, and R. L. Blackmore. Advice to a Young Poet: The Correspondence Between Llewelyn Powys and Kenneth Hopkins.

MLA (9th ed.) Citation

Powys, Llewelyn, et al. Advice to a Young Poet: The Correspondence Between Llewelyn Powys and Kenneth Hopkins.