Trask, C. (2006). It's easy being green: A handbook for earth-friendly living. Gibbs Smith.
Цитирование в стиле Чикаго (17-е изд.)Trask, Crissy. It's Easy Being Green: A Handbook for Earth-friendly Living. Salt Lake City, Utah: Gibbs Smith, 2006.
Цитирование MLA (8-е изд.)Trask, Crissy. It's Easy Being Green: A Handbook for Earth-friendly Living. Gibbs Smith, 2006.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.