(1995). Indicators of sustainable development: Guidelines and methodologies. s.n.
Cita Chicago (17th ed.)Indicators of Sustainable Development: Guidelines and Methodologies. [S.l: s.n, 1995.
Cita MLA (9th ed.)Indicators of Sustainable Development: Guidelines and Methodologies. s.n, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.