Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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