MLA

Great Britain. Public Record Office, United States. Army. Corps, 12th. Battle route of the XII Corps in the European theater of operations [cartographic material].. BRBL_00010ZF. 1945. https://collections.library.yale.edu/catalog/15238370.

APA, 6th edition

Great Britain. Public Record Office, & United States. Army. Corps, 12th. (["BRBL_00010ZF"])(1945)[Battle route of the XII Corps in the European theater of operations [cartographic material].]. https://collections.library.yale.edu/catalog/15238370.