APA (7th ed.) Citation

Gurney, O. R. (1990). The Hittites (2nd ed., reprinted with revisions.). Penguin Books.

Chicago Style (17th ed.) Citation

Gurney, Oliver Robert. The Hittites. 2nd ed., reprinted with revisions. London, England: Penguin Books, 1990.

MLA (9th ed.) Citation

Gurney, Oliver Robert. The Hittites. 2nd ed., reprinted with revisions. Penguin Books, 1990.