The development of Central Africa: A tour to the great copper belt of Katanga, the mines, railways and work of the Tanganyika Concessions, Limited. The Times Office.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)The Development of Central Africa: A Tour to the Great Copper Belt of Katanga, the Mines, Railways and Work of the Tanganyika Concessions, Limited. London: The Times Office.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)The Development of Central Africa: A Tour to the Great Copper Belt of Katanga, the Mines, Railways and Work of the Tanganyika Concessions, Limited. The Times Office.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.