APA aipamena

Shapiro, G. K., Surian, D., Dunn, A. G., Perry, R., & Kelaher, M. (2017). Comparing human papillomavirus vaccine concerns on Twitter: A cross-sectional study of users in Australia, Canada and the UK. BMJ Open.

Chicago Style aipamena

Shapiro, Gilla K., Didi Surian, Adam G. Dunn, Ryan Perry, and Margaret Kelaher. "Comparing Human Papillomavirus Vaccine Concerns On Twitter: A Cross-sectional Study of Users in Australia, Canada and the UK." BMJ Open 2017.

MLA aipamena

Shapiro, Gilla K., et al. "Comparing Human Papillomavirus Vaccine Concerns On Twitter: A Cross-sectional Study of Users in Australia, Canada and the UK." BMJ Open 2017.