APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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