Darwin, C. (1884). Journal of researches into the geology and natural history and geology of the countries visited during the voyage of H.M.S Beagle round the world. D. Appleton.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Darwin, Charles. Journal of Researches into the Geology and Natural History and Geology of the Countries Visited During the Voyage of H.M.S Beagle Round the World. New York: D. Appleton, 1884.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Darwin, Charles. Journal of Researches into the Geology and Natural History and Geology of the Countries Visited During the Voyage of H.M.S Beagle Round the World. D. Appleton, 1884.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.