Cita APA

Anderson, D. 1., & Williams, R. H. 1. (1993). The cost-effectiveness of GEF projects. Washington, D.C.: United Nations Development Programme.

Citación estilo Chicago

Anderson, Dennis 1937-, y Robert Howell 1940- Williams. The Cost-effectiveness of GEF Projects. Washington, D.C.: United Nations Development Programme, 1993.

Cita MLA

Anderson, Dennis 1937-, y Robert Howell 1940- Williams. The Cost-effectiveness of GEF Projects. Washington, D.C.: United Nations Development Programme, 1993.