APA (7 ম সংস্করণ) উদ্ধৃতি

Darwin, C., Barrett, P. H., Freeman, R. B., & Darwin, F. (1989). The different forms of flowers on plants of the same species. Pickering.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Darwin, Charles, Paul H. Barrett, R. B. Freeman, এবং Francis Darwin. The Different Forms of Flowers on Plants of the Same Species. London: Pickering, 1989.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Darwin, Charles, et al. The Different Forms of Flowers on Plants of the Same Species. Pickering, 1989.