APA (7th ed.) Citation

Wilkens, P., & Birkholz, J. Niedere Tiere. Pfriem.

Chicago Style (17th ed.) Citation

Wilkens, Peter, and Johannes Birkholz. Niedere Tiere. Wuppertal: Pfriem.

MLA (9th ed.) Citation

Wilkens, Peter, and Johannes Birkholz. Niedere Tiere. Pfriem.

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