Não informado. (2000). Bulletin of the Delaware University, Agricultural Experiment Station. Delaware Agricultural Experiment Station.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Bulletin of the Delaware University, Agricultural Experiment Station. Newark, Del: Delaware Agricultural Experiment Station, 2000.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Bulletin of the Delaware University, Agricultural Experiment Station. Delaware Agricultural Experiment Station, 2000.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.