Shreeve, T. (1982). Discovering Ecology. Stonehenge, The American Museum of Natural History.
Chicago-viite (17. p.)Shreeve, Tim. Discovering Ecology. London: Stonehenge, The American Museum of Natural History, 1982.
MLA-viite (9. p.)Shreeve, Tim. Discovering Ecology. Stonehenge, The American Museum of Natural History, 1982.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.