APA

National Institute for Occupational Safety and Health, Key M. M., . (1977). Occupational diseases. Washington: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health : for sale by the Supt. of Docs., U.S. Govt. Print. Off.

Chicago

National Institute for Occupational Safety and Health, Key Marcus M, . 1977. Occupational diseases. Washington: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health : for sale by the Supt. of Docs., U.S. Govt. Print. Off.

Harvard

National Institute for Occupational Safety and Health, Key M. M., . (1977). Occupational diseases. Washington: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health : for sale by the Supt. of Docs., U.S. Govt. Print. Off.

MLA

National Institute for Occupational Safety and Health, Key Marcus M, . Occupational diseases. Washington: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health : for sale by the Supt. of Docs., U.S. Govt. Print. Off. 1977.