APA (7th ed.) Citation

Alston, A. H. G. (1933). Certain ferns in Sir James Smith's herbarium ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Alston, A. H. G. Certain Ferns in Sir James Smith's Herbarium. [Sonderdr.]. 1933.

MLA (9th ed.) Citation

Alston, A. H. G. Certain Ferns in Sir James Smith's Herbarium. [Sonderdr.]. 1933.

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