APA (7th ed.) Citation

Riedl, J. A. (1970). Polygonum (1968). Wergo.

Chicago Style (17th ed.) Citation

Riedl, Josef Anton. Polygonum (1968). [Germany]: Wergo, 1970.

MLA (9th ed.) Citation

Riedl, Josef Anton. Polygonum (1968). Wergo, 1970.

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