Não informado. Programs for the Handicapped. Office for the Handicapped, Department of Health, Education and Welfare.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Programs for the Handicapped. Washington: Office for the Handicapped, Department of Health, Education and Welfare.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Programs for the Handicapped. Office for the Handicapped, Department of Health, Education and Welfare.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.