Dyfyniad APA

Mcconnell, R. L., & Abel , D. C. (2015). Environmental geology today. Jones & Bartlett.

Dyfyniad Arddull Chicago

Mcconnell, Robert L., and Daniel C. Abel. Environmental Geology Today. Burlington: Jones & Bartlett, 2015.

Dyfyniad MLA

Mcconnell, Robert L., and Daniel C. Abel. Environmental Geology Today. Jones & Bartlett, 2015.

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