United States Department of Agriculture, & Natural Resources Conservation Service. (1995). Soil survey laboratory information manual. Lincoln: National Soil Survey Center.
Trích dẫn kiểu ChicagoUnited States Department of Agriculture, và Natural Resources Conservation Service. Soil Survey Laboratory Information Manual. Lincoln: National Soil Survey Center, 1995.
MLA引文United States Department of Agriculture, và Natural Resources Conservation Service. Soil Survey Laboratory Information Manual. Lincoln: National Soil Survey Center, 1995.
警告：這些引文格式不一定是100％准確.