APA (7th ed.) Citation

Reid, R. E. H. (1961). The upper cretaceous hexactinellida of Great Britain and Northern Ireland.

Chicago Style (17th ed.) Citation

Reid, Robert Edward Hay. The Upper Cretaceous Hexactinellida of Great Britain and Northern Ireland. London, 1961.

MLA (9th ed.) Citation

Reid, Robert Edward Hay. The Upper Cretaceous Hexactinellida of Great Britain and Northern Ireland. 1961.

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