Cita APA

Trzyna, T. C. 1., & Osborn, J. K. (1995). A sustainable world: Defining and measuring sustainable development. California: IUCN-The World Conservation Union.

Citación estilo Chicago

Trzyna, Thaddeus C. 1939-, y Julia K. Osborn. A Sustainable World: Defining and Measuring Sustainable Development. California: IUCN-The World Conservation Union, 1995.

Cita MLA

Trzyna, Thaddeus C. 1939-, y Julia K. Osborn. A Sustainable World: Defining and Measuring Sustainable Development. California: IUCN-The World Conservation Union, 1995.