APA citiranje

Erickson, T. O., & Stefan, H. G. Natural groundwater recharge response to urbanization: Vermillion river watershed, Minnesota.

Trích dẫn kiểu Chicago

Erickson, Timothy O., và Heinz G. Stefan. Natural Groundwater Recharge Response to Urbanization: Vermillion River Watershed, Minnesota.

MLA citiranje

Erickson, Timothy O., và Heinz G. Stefan. Natural Groundwater Recharge Response to Urbanization: Vermillion River Watershed, Minnesota.