Cita APA

Groschen, G. E., & Groschen, G. E. (2000). Water quality in the Lower Illinois River Basin, Illinois, 1995-98. Denver, Colo.: Departamento of the Interior, U.S. Geological Survey.

Citación estilo Chicago

Groschen, George E., y George E. Groschen. Water Quality in the Lower Illinois River Basin, Illinois, 1995-98. Denver, Colo.: Departamento of the Interior, U.S. Geological Survey, 2000.

Cita MLA

Groschen, George E., y George E. Groschen. Water Quality in the Lower Illinois River Basin, Illinois, 1995-98. Denver, Colo.: Departamento of the Interior, U.S. Geological Survey, 2000.