APA (7th ed.) Citation

Grothe, T., Wandrey, F., & Schuerch, C. (2020). Cover Image. Phytotherapy research: PTR, 34(2), i. https://doi.org/10.1002/ptr.6632

Chicago Style (17th ed.) Citation

Grothe, Torsten, Franziska Wandrey, and Cornelia Schuerch. "Cover Image." Phytotherapy Research: PTR 34, no. 2 (2020): i. https://doi.org/10.1002/ptr.6632.

MLA (9th ed.) Citation

Grothe, Torsten, et al. "Cover Image." Phytotherapy Research: PTR, vol. 34, no. 2, 2020, p. i, https://doi.org/10.1002/ptr.6632.