Cita APA (7th ed.)
Schmidt-Bleek, F., Wiegandt, K., & Lustig, S. (2009). The Earth: Natural resources and human intervention. Haus Pub..
Cita Chicago (17th ed.)
Schmidt-Bleek, F., Klaus Wiegandt, i Sandra Lustig. The Earth: Natural Resources and Human Intervention. London: Haus Pub., 2009.
Cita MLA (9th ed.)
Schmidt-Bleek, F., et al. The Earth: Natural Resources and Human Intervention. Haus Pub., 2009.
Atenció: Aquestes cites poden no estar 100% correctes.