Ridley, J. R. (1994). Safety at work (4th ed.). Butterworth-Heinemann.
Chicago Style (17th ed.) CitationRidley, John R. Safety at Work. 4th ed. Oxford [Eng.]: Butterworth-Heinemann, 1994.
MLA (9th ed.) CitationRidley, John R. Safety at Work. 4th ed. Butterworth-Heinemann, 1994.
Warning: These citations may not always be 100% accurate.