CEVAP:

Legal sources of labour law consist of international sources and national sources:

International sources: Labour law has a human rights aspect to it that makes it a common subject of international documents, particularly those that govern economic and social rights such as the Universal Declaration of Human Rights of 1948 and the International Covenant on Economic, Social and Cultural Rights of 1976 adopted by the United Nations. Among the international sources of labour
law, the most common and significant documents consist of the conventions and recommendations
of the International Labour Organisation (ILO).

National Sources: National sources consist of official sources and private sources. The former refers to the sources of legislation that are adopted by the competent legislative authorities; whereas the latter consists of sources unique to labour law.