APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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