Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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