Παραπομπή APA

Stark, J. (2000). Water quality in the Upper Mississippi River Basin, Minnesota, Wisconsin, South Dakota, Iowa, and North Dakota, 1995-98. US Geological Survey circular 1211.

Παραπομπή Chicago Style

Stark, J.R. "Water Quality in the Upper Mississippi River Basin, Minnesota, Wisconsin, South Dakota, Iowa, and North Dakota, 1995-98." US Geological Survey Circular 1211 2000.

Παραπομπή MLA

Stark, J.R. "Water Quality in the Upper Mississippi River Basin, Minnesota, Wisconsin, South Dakota, Iowa, and North Dakota, 1995-98." US Geological Survey Circular 1211 2000.