Cita APA (7a ed.)

Unstead, R. J. (1974). The Middle Ages (1. publ. in this ed.). Black.

Cita Chicago Style (17a ed.)

Unstead, R. J. The Middle Ages. 1. publ. in this ed. London: Black, 1974.

Cita MLA (9a ed.)

Unstead, R. J. The Middle Ages. 1. publ. in this ed. Black, 1974.