Scotland, R., & Wortley, A. (2003). How many species of seed plants are there?
芝加哥风格引文Scotland, R., 与 A. Wortley. How Many Species of Seed Plants Are There? 2003.
MLA引文Scotland, R., 与 A. Wortley. How Many Species of Seed Plants Are There? 2003.
警告：这些引文格式不一定是100％准确.