I R Calder. (1998). Water - resource and land-use issues. Srilanka: IWMI(International Water Management Institute).
Stile di citazione ChicagoI R Calder. Water - Resource and Land-use Issues. Srilanka: IWMI(International Water Management Institute), 1998.
Citazione MLAI R Calder. Water - Resource and Land-use Issues. Srilanka: IWMI(International Water Management Institute), 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.