APA (7 ম সংস্করণ) উদ্ধৃতি
Darwin, C. (2001). On the origin of species by means of natural selection: Or, The Preservation of favoured races in the struggle for life. Electric Book Co..
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি
Darwin, Charles. On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life. London: Electric Book Co., 2001.
M.L.A (9 ম সংস্করণ) উদ্ধৃতি
Darwin, Charles. On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life. Electric Book Co., 2001.
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