United States Department of Agriculture, & Natural Resources Conservation Service. (1995). Soil survey laboratory information manual. Lincoln: National Soil Survey Center.
শিকাগো স্টাইলে সাইটেশনUnited States Department of Agriculture, এবং Natural Resources Conservation Service. Soil Survey Laboratory Information Manual. Lincoln: National Soil Survey Center, 1995.
এমএলএ সাইটেশনUnited States Department of Agriculture, এবং Natural Resources Conservation Service. Soil Survey Laboratory Information Manual. Lincoln: National Soil Survey Center, 1995.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.