APA
Estados Unidos. Department of Health E. a. W., . (198). Niosh manual of analytical methods. Springfield: National Technical Information Service.
Chicago
Estados Unidos. Department of Health Education and Welfare, . 198. Niosh manual of analytical methods. Springfield: National Technical Information Service.
Harvard
Estados Unidos. Department of Health E. a. W., . (198). Niosh manual of analytical methods. Springfield: National Technical Information Service.
MLA
Estados Unidos. Department of Health Education and Welfare, . Niosh manual of analytical methods. Springfield: National Technical Information Service. 198.