एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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