APA (7th ed.) Citation

Chesterton, G. K. (1986). The man who was Thursday: A nightmare. Penguin Books.

Chicago Style (17th ed.) Citation

Chesterton, G. K. The Man Who Was Thursday: A Nightmare. England: Penguin Books, 1986.

MLA (9th ed.) Citation

Chesterton, G. K. The Man Who Was Thursday: A Nightmare. Penguin Books, 1986.

Warning: These citations may not always be 100% accurate.