APA (7th ed.) Citation

Gurney, O. R. (1981). The Hittites (Rev. ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Gurney, O. R. The Hittites. Rev. ed. [Harmondsworth, England]: Penguin Books, 1981.

MLA (8th ed.) Citation

Gurney, O. R. The Hittites. Rev. ed. Penguin Books, 1981.