(1991). Profile on occupational safety and health in Papua New Guinea. International Labour Organization.
Chicago-referens (17:e uppl.)Profile on Occupational Safety and Health in Papua New Guinea. Bangkok, Thailand: International Labour Organization, 1991.
MLA-referens (9:e uppl.)Profile on Occupational Safety and Health in Papua New Guinea. International Labour Organization, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.