I R Calder. (1998). Water - resource and land-use issues. Srilanka: IWMI(International Water Management Institute).
Chicago Style CitationI R Calder. Water - Resource and Land-use Issues. Srilanka: IWMI(International Water Management Institute), 1998.
Cita MLAI R Calder. Water - Resource and Land-use Issues. Srilanka: IWMI(International Water Management Institute), 1998.
Atenció: Aquestes cites poden no estar 100% correctes.