Não informado. (1968). Gold bulletin: Research on gold ant its applications in industry. International Gold Corporation.
Citação do estilo Chicago (17ª ed.)Não informado. Gold Bulletin: Research on Gold Ant Its Applications in Industry. Marshalltown, Africa do Sul: International Gold Corporation, 1968.
Citação MLA (8ª ed.)Não informado. Gold Bulletin: Research on Gold Ant Its Applications in Industry. International Gold Corporation, 1968.
警告：這些引文格式不一定是100％准確.