APA

United States, . (1980). Protecting people at work: a reader in occupational safety and health. Washington, D.C: U.S. Dept. of Labor : for sale by the Supt. of Docs., U.S. Govt. Print. Off.

Chicago

United States, . 1980. Protecting people at work: a reader in occupational safety and health. Washington, D.C: U.S. Dept. of Labor : for sale by the Supt. of Docs., U.S. Govt. Print. Off.

Harvard

United States, . (1980). Protecting people at work: a reader in occupational safety and health. Washington, D.C: U.S. Dept. of Labor : for sale by the Supt. of Docs., U.S. Govt. Print. Off.

MLA

United States, . Protecting people at work: a reader in occupational safety and health. Washington, D.C: U.S. Dept. of Labor : for sale by the Supt. of Docs., U.S. Govt. Print. Off. 1980.