APA (7th ed.) Citation

Diels, L. (1902). Polypodiaceae ([Sonderdr.].). Engelmann.

Chicago Style (17th ed.) Citation

Diels, Ludwig. Polypodiaceae. [Sonderdr.]. Leipzig: Engelmann, 1902.

MLA (9th ed.) Citation

Diels, Ludwig. Polypodiaceae. [Sonderdr.]. Engelmann, 1902.

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