APA (7th ed.) Citation

Koestler, A. (1977). The Thirteenth tribe: The Khazar Empire and its heritage. Pan Books.

Chicago Style (17th ed.) Citation

Koestler, Arthur. The Thirteenth Tribe: The Khazar Empire and Its Heritage. London: Pan Books, 1977.

MLA (9th ed.) Citation

Koestler, Arthur. The Thirteenth Tribe: The Khazar Empire and Its Heritage. Pan Books, 1977.

Warning: These citations may not always be 100% accurate.