Tham khảo Tỷ_lệ_tấn_công

  1. Anthony N. Glaser. High-Yield Biostatistics. Williams & Wilkins. Baltimore. 1995
  2. International Epidemiological Association (2001). A Dictionary of Epidemiology. (Last JM, editor) (ấn bản 4). Oxford University Press. ISBN 978-0-19-514169-6.

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