Não informado. (1987). Mapping Awareness and Gis in Europe. Miles Arnold.
Chicago (17e ed.) BronvermeldingNão informado. Mapping Awareness and Gis in Europe. Oxfordshire, Inglaterra: Miles Arnold, 1987.
MLA (8e ed.) BronvermeldingNão informado. Mapping Awareness and Gis in Europe. Miles Arnold, 1987.
Let op: Deze citaties zijn niet altijd 100% accuraat.