Gabrys. Program Earth. University of Minnesota Press.
芝加哥风格引文Gabrys. Program Earth. University of Minnesota Press.
MLA引文Gabrys. Program Earth. University of Minnesota Press.
警告：这些引文格式不一定是100％准确.
APA引文
Gabrys. Program Earth. University of Minnesota Press.
芝加哥风格引文Gabrys. Program Earth. University of Minnesota Press.
MLA引文Gabrys. Program Earth. University of Minnesota Press.