एपीए उद्धरण

Easton, T. A. (2010). Environmental issues. Boston: McGraw-Hill.

शिकागो स्टाइल उद्धरण

Easton, Thomas A. Environmental Issues. Boston: McGraw-Hill, 2010.

एमएलए उद्धरण

Easton, Thomas A. Environmental Issues. Boston: McGraw-Hill, 2010.