Cita APA (7a ed.)

Owen, W., Owen, H., & Bell, J. (1967). Wilfred Owen: Collected letters. Oxford University Press.

Cita Chicago Style (17a ed.)

Owen, Wilfred, Harold Owen, y John Bell. Wilfred Owen: Collected Letters. London: Oxford University Press, 1967.

Cita MLA (9a ed.)

Owen, Wilfred, et al. Wilfred Owen: Collected Letters. Oxford University Press, 1967.