Παραπομπή σε μορφή APA (7η εκδ.)

Aryal, U., Petzold, M., & Krettek, A. (2016). Perceived Risks and Benefits of Cigarette Smoking among Nepalese Adolescents: A Population-Based Cross-Sectional Study.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Aryal, UR, M. Petzold, και A. Krettek. Perceived Risks and Benefits of Cigarette Smoking Among Nepalese Adolescents: A Population-Based Cross-Sectional Study. 2016.

Παραπομπή σε μορφή MLA (8th εκδ.)

Aryal, UR, et al. Perceived Risks and Benefits of Cigarette Smoking Among Nepalese Adolescents: A Population-Based Cross-Sectional Study. 2016.