Cita APA (7a ed.)

Willhardt, M., Parker, A. M., & Motion, A. (2000). Who's who in twentieth century world poetry. Routledge.

Cita Chicago Style (17a ed.)

Willhardt, Mark, Alan Michael Parker, y Andrew Motion. Who's Who in Twentieth Century World Poetry. London [etc.]: Routledge, 2000.

Cita MLA (9a ed.)

Willhardt, Mark, et al. Who's Who in Twentieth Century World Poetry. Routledge, 2000.