APA

Petersen D., . (1971). Techniques of safety management. New York: McGraw-Hill.

Chicago

Petersen Dan, . 1971. Techniques of safety management. New York: McGraw-Hill.

Harvard

Petersen D., . (1971). Techniques of safety management. New York: McGraw-Hill.

MLA

Petersen Dan, . Techniques of safety management. New York: McGraw-Hill. 1971.