APA
International Union for the Conservation of Nature, . (1991). Caring for the earth: A strategy for sustainable living. SWITZERLAND: I.U.C.N.
Chicago
International Union for the Conservation of Nature, . 1991. Caring for the earth: A strategy for sustainable living. SWITZERLAND: I.U.C.N.
Harvard
International Union for the Conservation of Nature, . (1991). Caring for the earth: A strategy for sustainable living. SWITZERLAND: I.U.C.N.
MLA
International Union for the Conservation of Nature, . Caring for the earth: A strategy for sustainable living. SWITZERLAND: I.U.C.N. 1991.
TextPublication details: SWITZERLAND 1991 I.U.C.N.Uniform titles: 
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