APA (7th ed.) Citation

Ridley, J. R. (1994). Safety at work (4th ed.). Butterworth-Heinemann.

Chicago Style (17th ed.) Citation

Ridley, John R. Safety at Work. 4th ed. Oxford [Eng.]: Butterworth-Heinemann, 1994.

MLA (9th ed.) Citation

Ridley, John R. Safety at Work. 4th ed. Butterworth-Heinemann, 1994.

Warning: These citations may not always be 100% accurate.