Birks, H., & Willis, K. (2008). Alpines, trees, and refugia in Europe.
芝加哥风格引文Birks, H., 与 K. Willis. Alpines, Trees, and Refugia in Europe. 2008.
MLA引文Birks, H., 与 K. Willis. Alpines, Trees, and Refugia in Europe. 2008.
警告：这些引文格式不一定是100％准确.
APA引文