Dyfyniad APA

Butlin, R. A., & Roberts, N. (1995). Ecological relations in historical times: Human impact and adaptation. Blackwell.

Dyfyniad Arddull Chicago

Butlin, R. A., and Neil Roberts. Ecological Relations in Historical Times: Human Impact and Adaptation. Oxford: Blackwell, 1995.

Dyfyniad MLA

Butlin, R. A., and Neil Roberts. Ecological Relations in Historical Times: Human Impact and Adaptation. Blackwell, 1995.

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