Dyfyniad APA

Smith, K. (2004). Environmental hazards: Assessing risk and reducing disaster (4th ed.). Routledge.

Dyfyniad Arddull Chicago

Smith, Keith. Environmental Hazards: Assessing Risk and Reducing Disaster. 4th ed. London: Routledge, 2004.

Dyfyniad MLA

Smith, Keith. Environmental Hazards: Assessing Risk and Reducing Disaster. 4th ed. Routledge, 2004.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.