APA (7th ed.) Citation

Liede, S. (1997). American Cynanchum (Asclepiadaceae)---A preliminary infrageneric classification. Zenodo.

Chicago Style (17th ed.) Citation

Liede, Sigrid. American Cynanchum (Asclepiadaceae)---A Preliminary Infrageneric Classification. Zenodo, 1997.

MLA (9th ed.) Citation

Liede, Sigrid. American Cynanchum (Asclepiadaceae)---A Preliminary Infrageneric Classification. Zenodo, 1997.

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