Oxford research encyclopedia of environmental science
MLA
Shugart, Herman H, and Richard A Betts. Oxford Research Encyclopedia of Environmental Science. Oxford: Oxford University Press
APA, 7th edition
Shugart, H. H, & Betts, R. A. Oxford research encyclopedia of environmental science. Oxford: Oxford University Press
Chicago, 17th edition
Shugart, Herman H., and Richard A Betts. Oxford research encyclopedia of environmental science. Oxford: Oxford University Press