APA引文

Ahmad, K., Khan, M. A., Khan, M. D., Qureshi, M. B., Chaudhry, T. A., & Gilbert, C. (2006). Perceptions of eye health in schools in Pakistan. BioMed Central.

Citação norma Chicago

Ahmad, Khabir, Mohammad Aman Khan, Mohammad Daud Khan, Mohammad Babar Qureshi, Tanveer Anjum Chaudhry, and Clare Gilbert. Perceptions of Eye Health in Schools in Pakistan. BioMed Central, 2006.

MLA引文

Ahmad, Khabir, et al. Perceptions of Eye Health in Schools in Pakistan. BioMed Central, 2006.