Citazione Stile APA (7a Edizione)

Unstead, R. J. (1974). From Cavemen to Vikings (1. publ. in this ed.). Black.

Citazione stile Chigago Style (17a edizione)

Unstead, R. J. From Cavemen to Vikings. 1. publ. in this ed. London: Black, 1974.

Citatione MLA (9a ed.)

Unstead, R. J. From Cavemen to Vikings. 1. publ. in this ed. Black, 1974.