APA-čujuhus (7. p.)
ebrary, Inc, Pfeifer-Hamilton (Firm), Lachecki, M., & Olson, C. (1991). Teaching kids to love the earth. Pfeifer-Hamilton.
Chicago-čujuhus (17. p.)
ebrary, Inc, Pfeifer-Hamilton (Firm), Marina Lachecki, juo Carolyn Olson. Teaching Kids to Love the Earth. Duluth, Minn.: Pfeifer-Hamilton, 1991.
MLA-čujuhus (9. p.)
ebrary, Inc, et al. Teaching Kids to Love the Earth. Pfeifer-Hamilton, 1991.
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