Harveson. Woody Plants of the Big Bend and Trans-Pecos. Texas A&M University Press.
芝加哥风格引文Harveson. Woody Plants of the Big Bend and Trans-Pecos. Texas A&M University Press.
MLA引文Harveson. Woody Plants of the Big Bend and Trans-Pecos. Texas A&M University Press.
警告：这些引文格式不一定是100％准确.