Citazione APA

Hughes, P., & Ferret, E. (2007). Introduction to health and safety in construction (2nd ed.). Butterworth- Heinemann.

Stile di citazione Chicago

Hughes, Phil, e Ed Ferret. Introduction to Health and Safety in Construction. 2nd ed. Oxford: Butterworth- Heinemann, 2007.

Citazione MLA

Hughes, Phil, e Ed Ferret. Introduction to Health and Safety in Construction. 2nd ed. Butterworth- Heinemann, 2007.