APA (7th ed.) Citation

Unstead, R. J. (1972). From Cavemen to Vikings (2. ed.). Black.

Chicago Style (17th ed.) Citation

Unstead, R. J. From Cavemen to Vikings. 2. ed. London: Black, 1972.

MLA (9th ed.) Citation

Unstead, R. J. From Cavemen to Vikings. 2. ed. Black, 1972.