APA (7th ed.) Citation

Croft, P. S. (1986). A key to the major groups of British freshwater invertebrates. Dorset Press.

Chicago Style (17th ed.) Citation

Croft, P. S. A Key to the Major Groups of British Freshwater Invertebrates. Dorchester, Dorset: Dorset Press, 1986.

MLA (9th ed.) Citation

Croft, P. S. A Key to the Major Groups of British Freshwater Invertebrates. Dorset Press, 1986.