ebrary, Inc. (1998). Safety and health in forestry work. International Labour Office.
Chicago-referens (17:e uppl.)ebrary, Inc. Safety and Health in Forestry Work. Geneva: International Labour Office, 1998.
MLA-referens (9:e uppl.)ebrary, Inc. Safety and Health in Forestry Work. International Labour Office, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.