APA (7th ed.) Citation

Paul, C. R. C. (1997). British Ordovician cystoids. Palaeontographical Soc.

Chicago Style (17th ed.) Citation

Paul, Christopher R. C. British Ordovician Cystoids. London: Palaeontographical Soc, 1997.

MLA (9th ed.) Citation

Paul, Christopher R. C. British Ordovician Cystoids. Palaeontographical Soc, 1997.