Cita APA (7a ed.)

Unesco., editor. (1970). Guide to national geographical information centres = Guide des Centres nationaux d'information bibliographique (3rd ed. revised and enlarged = 3e ed. revue et augmentee.). Unesco.

Cita Chicago Style (17a ed.)

Unesco., editor. Guide to National Geographical Information Centres = Guide Des Centres Nationaux D'information Bibliographique. 3rd ed. revised and enlarged = 3e ed. revue et augmentee. Paris: Unesco, 1970.

Cita MLA (9a ed.)

Unesco., editor. Guide to National Geographical Information Centres = Guide Des Centres Nationaux D'information Bibliographique. 3rd ed. revised and enlarged = 3e ed. revue et augmentee. Unesco, 1970.