APA (7th ed.) Citation

Gooch, G. P. (1956). Louis XV: The monarchy in decline. Longmans, Green.

Chicago Style (17th ed.) Citation

Gooch, G. P. Louis XV: The Monarchy in Decline. London, New York: Longmans, Green, 1956.

MLA (9th ed.) Citation

Gooch, G. P. Louis XV: The Monarchy in Decline. Longmans, Green, 1956.