APA

Cunliffe Barry, . (1997). The ancient Celts. New York: Oxford University Press.

Chicago

Cunliffe Barry, . 1997. The ancient Celts. New York: Oxford University Press.

Harvard

Cunliffe Barry, . (1997). The ancient Celts. New York: Oxford University Press.

MLA

Cunliffe Barry, . The ancient Celts. New York: Oxford University Press. 1997.