Cita APA (7th ed.)

Hawken, P. (1993). The ecology of commerce: How business can save the planet. London: Weidenfeld & Nicolson.

Cita Chicago (17th ed.)

Hawken, Paul. The Ecology of Commerce: How Business Can Save the Planet. London: Weidenfeld & Nicolson, 1993.

Cita MLA (8th ed.)

Hawken, Paul. The Ecology of Commerce: How Business Can Save the Planet. London: Weidenfeld & Nicolson, 1993.