Não informado. Extension Folder. North Carolina State College of Agriculture and Engineering, Agricultural Extension Service.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Extension Folder. Raleigh, NC: North Carolina State College of Agriculture and Engineering, Agricultural Extension Service.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Extension Folder. North Carolina State College of Agriculture and Engineering, Agricultural Extension Service.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.