Não informado. (2001). Bulletin of the Northern Institute for Sanitary and Bacteriology. Northern Institute for Sanitary and Bacteriology.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Bulletin of the Northern Institute for Sanitary and Bacteriology. Arkhangelsk, Rússia: Northern Institute for Sanitary and Bacteriology, 2001.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Bulletin of the Northern Institute for Sanitary and Bacteriology. Northern Institute for Sanitary and Bacteriology, 2001.
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