Cita APA

Nilsson, M. A., & Nilsson, M. A. (1997). Approaches to an earth audit. Stockholm: Stockholm Enviroment Institute.

Citación estilo Chicago

Nilsson, Mans A., y Mans A. Nilsson. Approaches to an Earth Audit. Stockholm: Stockholm Enviroment Institute, 1997.

Cita MLA

Nilsson, Mans A., y Mans A. Nilsson. Approaches to an Earth Audit. Stockholm: Stockholm Enviroment Institute, 1997.