Cita APA (7a ed.)

Wackernagel, M., Rees, W. E., & Testemale, P. (1996). Our ecological footprint: Reducing human impact on the earth. New Society.

Cita Chicago Style (17a ed.)

Wackernagel, Mathis, William E. Rees, y Phil Testemale. Our Ecological Footprint: Reducing Human Impact on the Earth. Gabriola Island, BC: New Society, 1996.

Cita MLA (9a ed.)

Wackernagel, Mathis, et al. Our Ecological Footprint: Reducing Human Impact on the Earth. New Society, 1996.