Dyfyniad APA

McConnell , R. L., & Abel , D. C. (2014). Environmental geology today. Jones & Bartlett Learning.

Dyfyniad Arddull Chicago

McConnell , Robert L., and Daniel C. Abel. Environmental Geology Today. Jones & Bartlett Learning, 2014.

Dyfyniad MLA

McConnell , Robert L., and Daniel C. Abel. Environmental Geology Today. Jones & Bartlett Learning, 2014.

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