Trask, C. (2006). It's easy being green: A handbook for earth-friendly living. Gibbs Smith.
芝加哥风格引文Trask, Crissy. It's Easy Being Green: A Handbook for Earth-friendly Living. Salt Lake City: Gibbs Smith, 2006.
MLA引文Trask, Crissy. It's Easy Being Green: A Handbook for Earth-friendly Living. Gibbs Smith, 2006.
警告：这些引文格式不一定是100％准确.