APA (7th ed.) Citation

Kulmala, I., Heinonen, K., & Salo, S. Improving Filtration Efficacy of Medical Face Masks. Springer.

Chicago Style (17th ed.) Citation

Kulmala, Ilpo, Kimmo Heinonen, and Satu Salo. Improving Filtration Efficacy of Medical Face Masks. Springer.

MLA (9th ed.) Citation

Kulmala, Ilpo, et al. Improving Filtration Efficacy of Medical Face Masks. Springer.