Cita APA (7th ed.)

Wackernagel, M., & Rees, W. (1996). Our ecological footprint: Reducing human impact on the Earth. New Society Publishers.

Cita Chicago (17th ed.)

Wackernagel, Mathis, i William Rees. Our Ecological Footprint: Reducing Human Impact on the Earth. Victoria: New Society Publishers, 1996.

Cita MLA (9th ed.)

Wackernagel, Mathis, i William Rees. Our Ecological Footprint: Reducing Human Impact on the Earth. New Society Publishers, 1996.