Não informado. (1971). British journal of mental subnormality. British Society for the Study of Mental Subnormality.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. British Journal of Mental Subnormality. Birmingham, Inglaterra: British Society for the Study of Mental Subnormality, 1971.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. British Journal of Mental Subnormality. British Society for the Study of Mental Subnormality, 1971.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.