Cita APA

Lieben, J. (1971). PERMISSIBLE LEVELS OF TOXIC SUBSTANCES IN THE WORKING ENVIRONMENT.

Chicago Style Citation

Lieben, Jan. PERMISSIBLE LEVELS OF TOXIC SUBSTANCES IN THE WORKING ENVIRONMENT. 1971.

Cita MLA

Lieben, Jan. PERMISSIBLE LEVELS OF TOXIC SUBSTANCES IN THE WORKING ENVIRONMENT. 1971.

Atenció: Aquestes cites poden no estar 100% correctes.