APA

Brentano R., . (1964). The early Middle Ages, 500-1000. [New York]: Free Press of Glencoe.

Chicago

Brentano Robert, . 1964. The early Middle Ages, 500-1000. [New York]: Free Press of Glencoe.

Harvard

Brentano R., . (1964). The early Middle Ages, 500-1000. [New York]: Free Press of Glencoe.

MLA

Brentano Robert, . The early Middle Ages, 500-1000. [New York]: Free Press of Glencoe. 1964.