Não informado. (1990). AEG news. Association of Engineering Geologists.
Chicago (17e ed.) BronvermeldingNão informado. AEG News. Lawrence, Kan: Association of Engineering Geologists, 1990.
MLA (8e ed.) BronvermeldingNão informado. AEG News. Association of Engineering Geologists, 1990.
Let op: Deze citaties zijn niet altijd 100% accuraat.