Birks, J. S. (1978). The Kingdom of Saudi Arabia and the Libyan Arab Jamahiriya: The key countries of employment. International Labour Office.
Dyfyniad Arddull ChicagoBirks, J. S. The Kingdom of Saudi Arabia and the Libyan Arab Jamahiriya: The Key Countries of Employment. Geneva [Switzerland]: International Labour Office, 1978.
Dyfyniad MLABirks, J. S. The Kingdom of Saudi Arabia and the Libyan Arab Jamahiriya: The Key Countries of Employment. International Labour Office, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.