Dyfyniad APA

Smith, K. (2004). Environmental hazards: Assessing risk and reducing disaster (Fourth edition.). Routledge/Taylor & Francis.

Dyfyniad Arddull Chicago

Smith, Keith. Environmental Hazards: Assessing Risk and Reducing Disaster. Fourth edition. London: Routledge/Taylor & Francis, 2004.

Dyfyniad MLA

Smith, Keith. Environmental Hazards: Assessing Risk and Reducing Disaster. Fourth edition. Routledge/Taylor & Francis, 2004.

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