Παραπομπή APA

Birley, E. (1959). Chesters Roman Fort, Northumberland. London: Her Majesty's Stationery Office.

Παραπομπή Chicago Style

Birley, Eric. Chesters Roman Fort, Northumberland. London: Her Majesty's Stationery Office, 1959.

Παραπομπή MLA

Birley, Eric. Chesters Roman Fort, Northumberland. London: Her Majesty's Stationery Office, 1959.

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