APA aipamena

Ridley, J., & Channing, J. (2008). Safety at work (7th ed.). Butterworth-Heinemann.

Chicago Style aipamena

Ridley, John, and John Channing. Safety at Work. 7th ed. Amsterdam: Butterworth-Heinemann, 2008.

MLA aipamena

Ridley, John, and John Channing. Safety at Work. 7th ed. Butterworth-Heinemann, 2008.