Cita APA (7a ed.)

Childs, P. (1999). The twentieth century in poetry: A critical survey. Routledge.

Cita Chicago Style (17a ed.)

Childs, Peter. The Twentieth Century in Poetry: A Critical Survey. London [etc.]: Routledge, 1999.

Cita MLA (9a ed.)

Childs, Peter. The Twentieth Century in Poetry: A Critical Survey. Routledge, 1999.