Butzer, K. W. (1971). Environment and archeology: An ecological approach to prehistory (2nd edition.). Aldine-Atherton.
Chicago-viite (17. p.)Butzer, Karl W. Environment and Archeology: An Ecological Approach to Prehistory. 2nd edition. Chicago: Aldine-Atherton, 1971.
MLA-viite (9. p.)Butzer, Karl W. Environment and Archeology: An Ecological Approach to Prehistory. 2nd edition. Aldine-Atherton, 1971.
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