League of Nations. Secretariat. Health Section & League of Nations. Health Organization. Epidemiological intelligence: Statistics of notifiable diseases. The League.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিLeague of Nations. Secretariat. Health Section এবং League of Nations. Health Organization. Epidemiological Intelligence: Statistics of Notifiable Diseases. Geneva: The League.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিLeague of Nations. Secretariat. Health Section এবং League of Nations. Health Organization. Epidemiological Intelligence: Statistics of Notifiable Diseases. The League.
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