APA (7th ed.) Citation

Mills, D. H. (1972). An introduction to freshwater ecology / (by) D.H. Mills. Oliver and Boyd.

Chicago Style (17th ed.) Citation

Mills, D. H. An Introduction to Freshwater Ecology / (by) D.H. Mills. Edinburgh: Oliver and Boyd, 1972.

MLA (9th ed.) Citation

Mills, D. H. An Introduction to Freshwater Ecology / (by) D.H. Mills. Oliver and Boyd, 1972.

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