International Labour Office & Technical Tripartite Meeting on the Coal-mining Industry. (1938). Technical tripartite meeting on the coal-mining industry, Geneva, May 1938: Report of the International Labour Office. International Labour Office.
Чикаго стиль цитування (17-те видання)International Labour Office та Technical Tripartite Meeting on the Coal-mining Industry. Technical Tripartite Meeting on the Coal-mining Industry, Geneva, May 1938: Report of the International Labour Office. Geneva: International Labour Office, 1938.
Стиль цитування MLA (8-ме видання)International Labour Office та Technical Tripartite Meeting on the Coal-mining Industry. Technical Tripartite Meeting on the Coal-mining Industry, Geneva, May 1938: Report of the International Labour Office. International Labour Office, 1938.