APA (7th ed.) Citation

Plumb, J. H. (1950). England in the eighteenth century. Penguin Books.

Chicago Style (17th ed.) Citation

Plumb, John Harold. England in the Eighteenth Century. [Harmondsworth, Middlesex]: Penguin Books, 1950.

MLA (9th ed.) Citation

Plumb, John Harold. England in the Eighteenth Century. Penguin Books, 1950.