APA (7th ed.) Citation

Walker, S. D., & Jermy, A. C. (1964). Dryopteris assimilis S. Walker in Britain ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Walker, Stanley D., and A. C. Jermy. Dryopteris Assimilis S. Walker in Britain. [Sonderdr.]. 1964.

MLA (9th ed.) Citation

Walker, Stanley D., and A. C. Jermy. Dryopteris Assimilis S. Walker in Britain. [Sonderdr.]. 1964.

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