APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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