Gaya APA

Asbury, S., Ashwell, P. (2007). Health and safety, environtment and quality audits : a risk-based approach (1st ed.). United Kingdom: Butterworth - Heinemann.

Gaya MLA

Asbury, Stephen., Ashwell, Peter. "Health and safety, environtment and quality audits : a risk-based approach". 1st ed. United Kingdom: Butterworth - Heinemann, 2007. Text.