(1976). Working environment: Sixth item on the agenda. Geneva: International Labour Office.
Παραπομπή Chicago StyleWorking Environment: Sixth Item On the Agenda. Geneva: International Labour Office, 1976.
Παραπομπή MLAWorking Environment: Sixth Item On the Agenda. Geneva: International Labour Office, 1976.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.