Cita APA

IUCN. (1972). European working conference on enviroment conservation education. [S.l.]: [s.n.].

Citación estilo Chicago

IUCN. European Working Conference On Enviroment Conservation Education. [S.l.]: [s.n.], 1972.

Cita MLA

IUCN. European Working Conference On Enviroment Conservation Education. [S.l.]: [s.n.], 1972.

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