APA

Smith J. D., MacDougall C. C., Johnstone J., Copes R. A., Schwartz B. & Garber G. E. (20170403). Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis. : CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne.

Chicago

Smith Jeffrey D, MacDougall Colin C, Johnstone Jennie, Copes Ray A, Schwartz Brian and Garber Gary E. 20170403. Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis. : CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne.

Harvard

Smith J. D., MacDougall C. C., Johnstone J., Copes R. A., Schwartz B. and Garber G. E. (20170403). Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis. : CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne.

MLA

Smith Jeffrey D, MacDougall Colin C, Johnstone Jennie, Copes Ray A, Schwartz Brian and Garber Gary E. Effectiveness of N95 respirators versus surgical masks in protecting health care workers from acute respiratory infection: a systematic review and meta-analysis. : CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne. 20170403.