APA (7th ed.) Zitazioa

(2017). Ruhrgebiet Industrial Cultural Landscape: Draft statement of outstanding universal value. Proposal for an update of the German tentative list for UNESCO world heritage (1a. ed.). SIG.

Chicago Style (17th ed.) Zitazioa

Ruhrgebiet Industrial Cultural Landscape: Draft Statement of Outstanding Universal Value. Proposal for an Update of the German Tentative List for UNESCO World Heritage. 1a. ed. s.l: SIG, 2017.

MLA (9th ed.) Zitazioa

Ruhrgebiet Industrial Cultural Landscape: Draft Statement of Outstanding Universal Value. Proposal for an Update of the German Tentative List for UNESCO World Heritage. 1a. ed. SIG, 2017.