APA (7th ed.) Citation

Tomasz Jerzyński, Gerry V. Stimson, Harry Shapiro, & Grzegorz Król. (2021). Estimation of the global number of e-cigarette users in 2020. BMC.

Chicago Style (17th ed.) Citation

Tomasz Jerzyński, Gerry V. Stimson, Harry Shapiro, and Grzegorz Król. Estimation of the Global Number of E-cigarette Users in 2020. BMC, 2021.

MLA (9th ed.) Citation

Tomasz Jerzyński, et al. Estimation of the Global Number of E-cigarette Users in 2020. BMC, 2021.

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