APA aipamena

WILLIAM P CUNNINGHAM. (2001). Environmental science. Boston, MA: McGraw-Hill.

Chicago Style aipamena

WILLIAM P CUNNINGHAM. Environmental Science. Boston, MA: McGraw-Hill, 2001.

MLA aipamena

WILLIAM P CUNNINGHAM. Environmental Science. Boston, MA: McGraw-Hill, 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.