APA (7th ed.) Citation

Tzvetanova, N., Simeonova, J., & Tzvetanova, Y. Risk Sexual Behaviour In Students Aged 12-18. Medical University - Pleven.

Chicago Style (17th ed.) Citation

Tzvetanova, Nevena, Joana Simeonova, and Yanka Tzvetanova. Risk Sexual Behaviour In Students Aged 12-18. Medical University - Pleven.

MLA (9th ed.) Citation

Tzvetanova, Nevena, et al. Risk Sexual Behaviour In Students Aged 12-18. Medical University - Pleven.