Birks, J. S. (1978). The Kingdom of Saudi Arabia and the Libyan Arab Jamahiriya: The key countries of employment. International Labour Office.
Lua i Stíl Chicago (17ú heag.)Birks, J. S. The Kingdom of Saudi Arabia and the Libyan Arab Jamahiriya: The Key Countries of Employment. Geneva [Switzerland]: International Labour Office, 1978.
Lua MLA (9ú heag.)Birks, J. S. The Kingdom of Saudi Arabia and the Libyan Arab Jamahiriya: The Key Countries of Employment. International Labour Office, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.