Cita APA

IUCN. (1973). Planning for man and nature in national parks. [S.l.]: [s.n.].

Citación estilo Chicago

IUCN. Planning for Man and Nature in National Parks. [S.l.]: [s.n.], 1973.

Cita MLA

IUCN. Planning for Man and Nature in National Parks. [S.l.]: [s.n.], 1973.