APA (7th ed.) Citation

New Holand & Harris, D. (1988). Hydroponics: The complete guide to gardering without soil. New Holand.

Chicago Style (17th ed.) Citation

New Holand and Dudley Harris. Hydroponics: The Complete Guide to Gardering Without Soil. London: New Holand, 1988.

MLA (8th ed.) Citation

New Holand and Dudley Harris. Hydroponics: The Complete Guide to Gardering Without Soil. New Holand, 1988.

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