APA (7th ed.) Citation

Chesterton, G. K. (1950). The innocence of father Brown. Penguin Books.

Chicago Style (17th ed.) Citation

Chesterton, Gilbert Keith. The Innocence of Father Brown. Montreal: Penguin Books, 1950.

MLA (9th ed.) Citation

Chesterton, Gilbert Keith. The Innocence of Father Brown. Penguin Books, 1950.