Darwin, C., Barrett, P. H., & Freeman, R. B. (1988). The various contrivances by which orchids are fertilized by insects. Pickering.
Citação do estilo Chicago (17ª ed.)Darwin, Charles, Paul H. Barrett, e R. B. Freeman. The Various Contrivances by Which Orchids Are Fertilized by Insects. London: Pickering, 1988.
Citação MLA (8ª ed.)Darwin, Charles, et al. The Various Contrivances by Which Orchids Are Fertilized by Insects. Pickering, 1988.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.