(2006). Abstracts. 18th World congress of soil science (July 9-15, 2006, Philadelphia).
Citazione stile Chigago Style (17a edizione)Abstracts. 18th World Congress of Soil Science (July 9-15, 2006, Philadelphia). 2006.
Citatione MLA (9a ed.)Abstracts. 18th World Congress of Soil Science (July 9-15, 2006, Philadelphia). 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.