Birks, H., & Willis, K. (2008). Alpines, trees, and refugia in Europe.
Chicago Style (17th ed.) CitationBirks, H., and K. Willis. Alpines, Trees, and Refugia in Europe. 2008.
MLA引文Birks, H., and K. Willis. Alpines, Trees, and Refugia in Europe. 2008.
警告：這些引文格式不一定是100％准確.