Freeman. Trees, Shrubs, and Woody Vines in Kansas. University Press of Kansas.
芝加哥风格引文Freeman. Trees, Shrubs, and Woody Vines in Kansas. University Press of Kansas.
MLA引文Freeman. Trees, Shrubs, and Woody Vines in Kansas. University Press of Kansas.
警告：这些引文格式不一定是100％准确.