APA način citiranja

Tsigaris, P., & Teixeira da Silva, J. A. (2020). Smoking Prevalence and COVID-19 in Europe. Nicotine Tob Res.

Čikaški stil citiranja

Tsigaris, Panagiotis, i Jaime A. Teixeira da Silva. "Smoking Prevalence and COVID-19 in Europe." Nicotine Tob Res 2020.

MLA način citiranja

Tsigaris, Panagiotis, i Jaime A. Teixeira da Silva. "Smoking Prevalence and COVID-19 in Europe." Nicotine Tob Res 2020.