Servat, E. (2006). FRIEND - a global perspective 2002 - 2006: United Nations Education, Scientific and Cultural Organisation international hydrological programme VI, FRIEND - flow regimes from international experimental and network data. Dt. Nationalkomitee für das IHP und das HWRP.
Chicago Style (17th ed.) CitationServat, Eric. FRIEND - a Global Perspective 2002 - 2006: United Nations Education, Scientific and Cultural Organisation International Hydrological Programme VI, FRIEND - Flow Regimes from International Experimental and Network Data. Koblenz: Dt. Nationalkomitee für das IHP und das HWRP, 2006.
MLA (9th ed.) CitationServat, Eric. FRIEND - a Global Perspective 2002 - 2006: United Nations Education, Scientific and Cultural Organisation International Hydrological Programme VI, FRIEND - Flow Regimes from International Experimental and Network Data. Dt. Nationalkomitee für das IHP und das HWRP, 2006.