APA (7th ed.) Citation

Birken, S. (1996). Die Orchideen des Kreises Steinfurt. Biologisches Inst. Metelen.

Chicago Style (17th ed.) Citation

Birken, Siegmar. Die Orchideen Des Kreises Steinfurt. Metelen: Biologisches Inst. Metelen, 1996.

MLA (9th ed.) Citation

Birken, Siegmar. Die Orchideen Des Kreises Steinfurt. Biologisches Inst. Metelen, 1996.

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