Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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