(1994). IGBP in Action: Work Plan 1994 - 1998. International Geosphere-Biosphere Programme (IGBP).
Cita Chicago (17th ed.)IGBP in Action: Work Plan 1994 - 1998. Stockholm: International Geosphere-Biosphere Programme (IGBP), 1994.
Cita MLA (9th ed.)IGBP in Action: Work Plan 1994 - 1998. International Geosphere-Biosphere Programme (IGBP), 1994.
Atenció: Aquestes cites poden no estar 100% correctes.