Cita APA (7th ed.)
ebrary, Inc, & Carlsen, W. S. (2004). Watershed dynamics (Teacher ed.). National Science Teachers Association.
Cita Chicago (17th ed.)
ebrary, Inc, i William S. Carlsen. Watershed Dynamics. Teacher ed. Arlington, Va.: National Science Teachers Association, 2004.
Cita MLA (9th ed.)
ebrary, Inc, i William S. Carlsen. Watershed Dynamics. Teacher ed. National Science Teachers Association, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.