Não informado. (1974). Social and labour bulletin. International Labour Office.
Style de citation Chicago (17e éd.)Não informado. Social and Labour Bulletin. Geneva, Suíça: International Labour Office, 1974.
Style de citation MLA (8e éd.)Não informado. Social and Labour Bulletin. International Labour Office, 1974.
Attention : ces citations peuvent ne pas être correctes à 100%.