349201 Ridley, J., & Pearce, D. (2003). Safety with machinery. Oxford : Butterworth-Heinemann.
Čikaški stil citiranja (17. izdanje)349201 Ridley, John, i Dick Pearce. Safety with Machinery. Oxford : Butterworth-Heinemann, 2003.
MLA način citiranja (9. izdanje)349201 Ridley, John, i Dick Pearce. Safety with Machinery. Oxford : Butterworth-Heinemann, 2003.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.