APA (7th ed.) Citation

Siebert, H., Xibaite, H., Zijbert, C., & Trebeis, O. V. .

Chicago Style (17th ed.) Citation

Siebert, Horst, Huosite Xibaite, Chorst Zijbert, and Orestes V. Trebeis. .

MLA (9th ed.) Citation

Siebert, Horst, et al. .

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