Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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