APA (7th ed.) Citation

Laing, R. D. (1965). The divided self: An existential study in sanity and madness. Penguin Books.

Chicago Style (17th ed.) Citation

Laing, R. D. The Divided Self: An Existential Study in Sanity and Madness. Baltimore: Penguin Books, 1965.

MLA (9th ed.) Citation

Laing, R. D. The Divided Self: An Existential Study in Sanity and Madness. Penguin Books, 1965.