APA (7th ed.) Citation

Don, J., & Chisholm, J. (1911). Modern methods of water purification. E. Arnold.

Chicago Style (17th ed.) Citation

Don, John, and John Chisholm. Modern Methods of Water Purification. London: E. Arnold, 1911.

MLA (9th ed.) Citation

Don, John, and John Chisholm. Modern Methods of Water Purification. E. Arnold, 1911.