APA (7th ed.) Citation

Widén, C. (1991). The Phloroglucinols of Dryopteris villari complex and some related ferns Pteridophyta, Dryopteridaceae ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Widén, Carl-Johan. The Phloroglucinols of Dryopteris Villari Complex and Some Related Ferns Pteridophyta, Dryopteridaceae. [Sonderdr.]. 1991.

MLA (9th ed.) Citation

Widén, Carl-Johan. The Phloroglucinols of Dryopteris Villari Complex and Some Related Ferns Pteridophyta, Dryopteridaceae. [Sonderdr.]. 1991.

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