Não informado. (1990). AEG news. Association of Engineering Geologists.
Chicagoスタイル(17版)引用形式Não informado. AEG News. Lawrence, Kan: Association of Engineering Geologists, 1990.
MLA(8版)引用形式Não informado. AEG News. Association of Engineering Geologists, 1990.
警告: この引用は必ずしも正確ではありません.