APA (7th ed.) Zitazioa

World Trade Press & ebrary, Inc. (2010). Germany: Communications. World Trade Press.

Chicago Style (17th ed.) Zitazioa

World Trade Press eta Inc ebrary. Germany: Communications. Petaluma, Calif.: World Trade Press, 2010.

MLA (9th ed.) Zitazioa

World Trade Press eta Inc ebrary. Germany: Communications. World Trade Press, 2010.