International Institute for Applied Systems Analysis & Levien, R. E. (1981). Draft research plan 1982-1986. International Institute for Applied Systems Analysis.
Citazione stile Chigago Style (17a edizione)International Institute for Applied Systems Analysis e Roger Eli Levien. Draft Research Plan 1982-1986. Laxenburg: International Institute for Applied Systems Analysis, 1981.
Citatione MLA (9a ed.)International Institute for Applied Systems Analysis e Roger Eli Levien. Draft Research Plan 1982-1986. International Institute for Applied Systems Analysis, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.