International Civil Aviation Organization. (1970). International signs to facilitate passengers using airports.
Chicago-Zitierstil (17. Ausg.)International Civil Aviation Organization. International Signs to Facilitate Passengers Using Airports. Montrealn, 1970.
MLA-Zitierstil (9. Ausg.)International Civil Aviation Organization. International Signs to Facilitate Passengers Using Airports. 1970.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.