APA (7th ed.) Citation

Owens, R. M. (1973). British ordovician and silurian proetidae (trilobita). Palaeontographical Soc.

Chicago Style (17th ed.) Citation

Owens, Robert M. British Ordovician and Silurian Proetidae (trilobita). London: Palaeontographical Soc, 1973.

MLA (9th ed.) Citation

Owens, Robert M. British Ordovician and Silurian Proetidae (trilobita). Palaeontographical Soc, 1973.

Warning: These citations may not always be 100% accurate.