Citazione Stile APA (7a Edizione)

ENGER ELDON D. (2013). ENVIRONMENTAL SCIENCE (13TH ED.). MC GRAW HILL.

Citazione stile Chigago Style (17a edizione)

ENGER ELDON D. ENVIRONMENTAL SCIENCE. 13TH ED. NEW YORK: MC GRAW HILL, 2013.

Citatione MLA (9a ed.)

ENGER ELDON D. ENVIRONMENTAL SCIENCE. 13TH ED. MC GRAW HILL, 2013.