Não informado. (1959). Illinois research. University of Illinois at Urbana-Champaign, Agricultural Experiment Station.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Illinois Research. Urbana, Ill: University of Illinois at Urbana-Champaign, Agricultural Experiment Station, 1959.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Illinois Research. University of Illinois at Urbana-Champaign, Agricultural Experiment Station, 1959.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.