APA (7th ed.) Citation

Opie, I. A., & Opie, P. (1967). The lore and language of schoolchildren. Oxford University Press.

Chicago Style (17th ed.) Citation

Opie, Iona Archibald, and Peter Opie. The Lore and Language of Schoolchildren. London [etc.]: Oxford University Press, 1967.

MLA (9th ed.) Citation

Opie, Iona Archibald, and Peter Opie. The Lore and Language of Schoolchildren. Oxford University Press, 1967.