Cita APA (7th ed.)
Winsemius, P., & Guntram, U. (2002). A thousand shades of green: Sustainable strategies for competitive advantage. Earthscan.
Cita Chicago (17th ed.)
Winsemius, Pieter, i Ulrich Guntram. A Thousand Shades of Green: Sustainable Strategies for Competitive Advantage. London ; Sterling, VA: Earthscan, 2002.
Cita MLA (9th ed.)
Winsemius, Pieter, i Ulrich Guntram. A Thousand Shades of Green: Sustainable Strategies for Competitive Advantage. Earthscan, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.