APA (7e ed.) Bronvermelding

Não informado. (1981). Mountain Research and Development. United Nations University.

Chicago (17e ed.) Bronvermelding

Não informado. Mountain Research and Development. Boulder, Colo: United Nations University, 1981.

MLA (8e ed.) Bronvermelding

Não informado. Mountain Research and Development. United Nations University, 1981.

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