APA
Owen R., . (18). Monograph on the fossil Reptilia of the Wealden and Purbeck Formations. London: Palaeontographical Society.
Chicago
Owen Richard, . 18. Monograph on the fossil Reptilia of the Wealden and Purbeck Formations. London: Palaeontographical Society.
Harvard
Owen R., . (18). Monograph on the fossil Reptilia of the Wealden and Purbeck Formations. London: Palaeontographical Society.
MLA
Owen Richard, . Monograph on the fossil Reptilia of the Wealden and Purbeck Formations. London: Palaeontographical Society. 18.