American Medical Association, National Institute for Occupational Safety and Health (U.S.), American Medical Association Congress on Occupational Health, Hatch, L. L., Doege, T. C., & Wheater, R. H. (1978). Occupational safety and health symposia, 1977. U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, Division of Technical Services ; For sale by the Supt. of Docs., U.S. G.P.O..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)American Medical Association, National Institute for Occupational Safety and Health (U.S.), American Medical Association Congress on Occupational Health, Loren L. Hatch, Theodore C. Doege, و Robert H. Wheater. Occupational Safety and Health Symposia, 1977. Cincinnati, Ohio : Washington, D.C.: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, Division of Technical Services ; For sale by the Supt. of Docs., U.S. G.P.O., 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)American Medical Association, et al. Occupational Safety and Health Symposia, 1977. U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, Division of Technical Services ; For sale by the Supt. of Docs., U.S. G.P.O., 1978.