APA (7th ed.) Citation

Opie, I. A., & Opie, P. (1951). The Oxford dictionary of Nursery Rhymes. Oxford University Press.

Chicago Style (17th ed.) Citation

Opie, Iona Archibald, and Peter Opie. The Oxford Dictionary of Nursery Rhymes. Oxford: Oxford University Press, 1951.

MLA (9th ed.) Citation

Opie, Iona Archibald, and Peter Opie. The Oxford Dictionary of Nursery Rhymes. Oxford University Press, 1951.