Gaya APA

Zobel, R, W., Wright, S, F. (2005). Roots and Soil Management: Interactions between roots and the soil . Wisconsin: American Society of Agronomy.

Gaya MLA

Zobel, Richard, W.., Wright, Sara, F.. "Roots and Soil Management: Interactions between roots and the soil". Wisconsin: American Society of Agronomy, 2005. Text.