APA (7th ed.) Citation

Pflugfelder, S. C., & Stern, M. E. (2020). Biological functions of tear film. Experimental eye research, 197, 108115. https://doi.org/10.1016/j.exer.2020.108115

Chicago Style (17th ed.) Citation

Pflugfelder, Stephen C., and Michael E. Stern. "Biological Functions of Tear Film." Experimental Eye Research 197 (2020): 108115. https://doi.org/10.1016/j.exer.2020.108115.

MLA (9th ed.) Citation

Pflugfelder, Stephen C., and Michael E. Stern. "Biological Functions of Tear Film." Experimental Eye Research, vol. 197, 2020, p. 108115, https://doi.org/10.1016/j.exer.2020.108115.