The second world war : : a guide to documents in the Public Record Office. 
  MLA
  Cantwell, John D. The Second World War : a Guide to Documents In the Public Record Office. Rev. 3rd ed. Richmond: PRO, 1998.
  APA
  Cantwell, J. D. (1998). The second world war : a guide to documents in the Public Record Office. Rev. 3rd ed. Richmond: PRO.
  Chicago
  Cantwell, John D. The Second World War: A Guide to Documents In the Public Record Office. Rev. 3rd ed. Richmond: PRO, 1998.