Cita APA

Scotland, R., & Wortley, A. (2003). How many species of seed plants are there?

Citación estilo Chicago

Scotland, R., and A. Wortley. How Many Species of Seed Plants Are There? 2003.

Cita MLA

Scotland, R., and A. Wortley. How Many Species of Seed Plants Are There? 2003.

Warning: These citations may not always be 100% accurate.