United States Department of Agriculture, & Natural Resources Conservation Service. (1996). Soil survey methods manual: The soil survey analytical continuum. Lincoln: National Soil Survey Center.
Trích dẫn kiểu ChicagoUnited States Department of Agriculture, và Natural Resources Conservation Service. Soil Survey Methods Manual: The Soil Survey Analytical Continuum. Lincoln: National Soil Survey Center, 1996.
Deismireacht MLAUnited States Department of Agriculture, và Natural Resources Conservation Service. Soil Survey Methods Manual: The Soil Survey Analytical Continuum. Lincoln: National Soil Survey Center, 1996.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.