APA (7th ed.) Citation

Gregory, P. J. (2006). Plant roots: Growth, activity, and interaction with soils. Blackwell Pub..

Chicago Style (17th ed.) Citation

Gregory, P. J. Plant Roots: Growth, Activity, and Interaction with Soils. Oxford ; Ames, Iowa: Blackwell Pub., 2006.

MLA (9th ed.) Citation

Gregory, P. J. Plant Roots: Growth, Activity, and Interaction with Soils. Blackwell Pub., 2006.