Krapf, J. L. (1968). Travels, researches, and missionary labours during an eighteen years' residence in Eastern Africa: Together with journeys to Jagga, Usambara, Ukambani, Shoa, Abessinia and Khartum, and a coasting voyage from Mombaz to Cape Delgado (Second edition.). Cass.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Krapf, J. L. Travels, Researches, and Missionary Labours During an Eighteen Years' Residence in Eastern Africa: Together with Journeys to Jagga, Usambara, Ukambani, Shoa, Abessinia and Khartum, and a Coasting Voyage from Mombaz to Cape Delgado. Second edition. London: Cass, 1968.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Krapf, J. L. Travels, Researches, and Missionary Labours During an Eighteen Years' Residence in Eastern Africa: Together with Journeys to Jagga, Usambara, Ukambani, Shoa, Abessinia and Khartum, and a Coasting Voyage from Mombaz to Cape Delgado. Second edition. Cass, 1968.