APA-viite

ball Desmond and Babbage Ross. (1989). Geographic information systems: Defence applications. Pergamon.

Chicago-tyylinen lähdeviittaus

ball Desmond and Babbage Ross. Geographic Information Systems: Defence Applications. Australia: Pergamon, 1989.

MLA-viite

ball Desmond and Babbage Ross. Geographic Information Systems: Defence Applications. Pergamon, 1989.