APA (7e ed.) Bronvermelding

Johnston, R. H. (1997). Hydrologic budgets of regional aquifer systems of the United States for predevelopment and development conditions GB1199.2 .J. U.S. Geological Survey.

Chicago (17e ed.) Bronvermelding

Johnston, Richard H. Hydrologic Budgets of Regional Aquifer Systems of the United States for Predevelopment and Development Conditions GB1199.2 .J. Denver, Colorado, USA: U.S. Geological Survey, 1997.

MLA (9e ed.) Bronvermelding

Johnston, Richard H. Hydrologic Budgets of Regional Aquifer Systems of the United States for Predevelopment and Development Conditions GB1199.2 .J. U.S. Geological Survey, 1997.