APA (7th ed.) Citation

Buttler, K. P., & Elsner, O. (1990). Galium schultesii im Frankenwald.

Chicago Style (17th ed.) Citation

Buttler, Karl Peter, and Otto Elsner. Galium Schultesii Im Frankenwald. 1990.

MLA (9th ed.) Citation

Buttler, Karl Peter, and Otto Elsner. Galium Schultesii Im Frankenwald. 1990.

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