APA (7th ed.) Citation

Roberts, P. D. (1986). How poetry works: The elements of English poetry. Penguin Books.

Chicago Style (17th ed.) Citation

Roberts, Philip Davies. How Poetry Works: The Elements of English Poetry. Harmondsworth, Middlesex, England: Penguin Books, 1986.

MLA (9th ed.) Citation

Roberts, Philip Davies. How Poetry Works: The Elements of English Poetry. Penguin Books, 1986.