Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Butlin, Robin Alan,, y Neil Roberts. Ecological Relations in Historical Times: Human Impact and Adaptation. Oxford [etc.]: Blackwell, 1995.

Cita MLA (9a ed.)

Butlin, Robin Alan,, y Neil Roberts. Ecological Relations in Historical Times: Human Impact and Adaptation. Blackwell, 1995.