Cita APA (7th ed.)

Roberts, P. (2000). How poetry works (2nd ed.). Penguin Books.

Cita Chicago (17th ed.)

Roberts, Philip. How Poetry Works. 2nd ed. Harmondsworth, Middlesex, England ; New York, New York, U.S.A.: Penguin Books, 2000.

Cita MLA (8th ed.)

Roberts, Philip. How Poetry Works. 2nd ed. Penguin Books, 2000.