APA (7th ed.) Citation

Roberts, P. (1987). How poetry works: The elements of English poetry. Penguin Books.

Chicago Style (17th ed.) Citation

Roberts, Philip. How Poetry Works: The Elements of English Poetry. Harmondsworth: Penguin Books, 1987.

MLA (9th ed.) Citation

Roberts, Philip. How Poetry Works: The Elements of English Poetry. Penguin Books, 1987.