Cita APA

Enger Eldon D, & Smith Bradley F. (2009). Environmental Science. NewYork: Mc Graw-Hill.

Chicago Style Citation

Enger Eldon D, i Smith Bradley F. Environmental Science. NewYork: Mc Graw-Hill, 2009.

Cita MLA

Enger Eldon D, i Smith Bradley F. Environmental Science. NewYork: Mc Graw-Hill, 2009.

Atenció: Aquestes cites poden no estar 100% correctes.