Dixon, W. G. (1985). Sources of information on engineering geology and related topics for northeastern Illinois. Illinois State Geolog. Survey.
Chicago-Zitierstil (17. Ausg.)Dixon, William G. Sources of Information on Engineering Geology and Related Topics for Northeastern Illinois. Champaign, Ill: Illinois State Geolog. Survey, 1985.
MLA-Zitierstil (9. Ausg.)Dixon, William G. Sources of Information on Engineering Geology and Related Topics for Northeastern Illinois. Illinois State Geolog. Survey, 1985.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.