APA (7e ed.) Bronvermelding

al.], H. G. .. Guidelines for economic appraisal of watershed management projects. FAO.

Chicago (17e ed.) Bronvermelding

al.], H.M. Gregersen ...[et. Guidelines for Economic Appraisal of Watershed Management Projects. FAO.

MLA (8e ed.) Bronvermelding

al.], H.M. Gregersen ...[et. Guidelines for Economic Appraisal of Watershed Management Projects. FAO.

Let op: Deze citaties zijn niet altijd 100% accuraat.