APA (7th ed.) Citation

Alston, A. H. G. (1940). Undescribed ferns from New Guinea. [Hardwicke].

Chicago Style (17th ed.) Citation

Alston, A. H. G. Undescribed Ferns from New Guinea. [London]: [Hardwicke], 1940.

MLA (9th ed.) Citation

Alston, A. H. G. Undescribed Ferns from New Guinea. [Hardwicke], 1940.

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