Citazione Stile APA (7a Edizione)

Trask, C. (2006). It's easy being green: A handbook for earth-friendly living. Gibbs Smith.

Citazione stile Chigago Style (17a edizione)

Trask, Crissy. It's Easy Being Green: A Handbook for Earth-friendly Living. Salt Lake City: Gibbs Smith, 2006.

Citatione MLA (9a ed.)

Trask, Crissy. It's Easy Being Green: A Handbook for Earth-friendly Living. Gibbs Smith, 2006.