Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Gregory, P. J. Plant Roots: Growth, Activity and Interactions with Soils. Oxford [etc.]: Blackwell, 2006.

Cita MLA (9a ed.)

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