APA (7th ed.) Citation

Crundwell, A. C., & Warburg, E. F. (1963). Seligeria oelandica in Ireland, new to the British Isles ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Crundwell, A. C., and Edmund Fredric Warburg. Seligeria Oelandica in Ireland, New to the British Isles. [Sonderdr.]. 1963.

MLA (9th ed.) Citation

Crundwell, A. C., and Edmund Fredric Warburg. Seligeria Oelandica in Ireland, New to the British Isles. [Sonderdr.]. 1963.