Cita APA (7th ed.)

ebrary, Inc, & Carlsen, W. S. (2004). Watershed dynamics (Teacher ed.). NSTA Press, National Science Teachers Association.

Cita Chicago (17th ed.)

ebrary, Inc, i William S. Carlsen. Watershed Dynamics. Teacher ed. Arlington, Va.: NSTA Press, National Science Teachers Association, 2004.

Cita MLA (9th ed.)

ebrary, Inc, i William S. Carlsen. Watershed Dynamics. Teacher ed. NSTA Press, National Science Teachers Association, 2004.