Não informado. (1968). Gold bulletin: Research on gold ant its applications in industry. International Gold Corporation.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Gold Bulletin: Research on Gold Ant Its Applications in Industry. Marshalltown, Africa do Sul: International Gold Corporation, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Gold Bulletin: Research on Gold Ant Its Applications in Industry. International Gold Corporation, 1968.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.