APA (7th ed.) Citation

Tryon, R. M. (1956). A revision of the American species of Notholaena ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Tryon, Rolla Milton. A Revision of the American Species of Notholaena. [Sonderdr.]. 1956.

MLA (9th ed.) Citation

Tryon, Rolla Milton. A Revision of the American Species of Notholaena. [Sonderdr.]. 1956.

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