APA
Gurney O. R., . (1954). The Hittites. Harmondsworth: Penguin Books.
Chicago
Gurney O R, . 1954. The Hittites. Harmondsworth: Penguin Books.
Harvard
Gurney O. R., . (1954). The Hittites. Harmondsworth: Penguin Books.
MLA
Gurney O R, . The Hittites. Harmondsworth: Penguin Books. 1954.
