Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.