University of Nebraska (Lincoln campus). Agricultural Experiment Station & University of Nebraska--Lincoln. Agricultural Experiment Station. Annual report. Agricultural Experiment Station, University of Nebraska, Lincoln College of Agriculture.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUniversity of Nebraska (Lincoln campus). Agricultural Experiment Station এবং University of Nebraska--Lincoln. Agricultural Experiment Station. Annual Report. Lincoln: Agricultural Experiment Station, University of Nebraska, Lincoln College of Agriculture.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিUniversity of Nebraska (Lincoln campus). Agricultural Experiment Station এবং University of Nebraska--Lincoln. Agricultural Experiment Station. Annual Report. Agricultural Experiment Station, University of Nebraska, Lincoln College of Agriculture.