(1991). Profile on occupational safety and health in Papua New Guinea. International Labour Organization.
Chicago Style aipamenaProfile on Occupational Safety and Health in Papua New Guinea. Bangkok, Thailand: International Labour Organization, 1991.
MLA aipamenaProfile on Occupational Safety and Health in Papua New Guinea. International Labour Organization, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.