Cita APA (7a ed.)

Willey, B. (1962). The eighteenth-century background. Penguin Books.

Cita Chicago Style (17a ed.)

Willey, Basil. The Eighteenth-century Background. London: Penguin Books, 1962.

Cita MLA (8a ed.)

Willey, Basil. The Eighteenth-century Background. Penguin Books, 1962.