APA (7th ed.) Citation

Heikinheimo, O., Toffol, E., Partonen, T., But, A., Latvala, A., & Haukka, J. Systemic hormonal contraception and risk of venous thromboembolism. Wiley.

Chicago Style (17th ed.) Citation

Heikinheimo, Oskari, Elena Toffol, Timo Partonen, Anna But, Antti Latvala, and Jari Haukka. Systemic Hormonal Contraception and Risk of Venous Thromboembolism. Wiley.

MLA (9th ed.) Citation

Heikinheimo, Oskari, et al. Systemic Hormonal Contraception and Risk of Venous Thromboembolism. Wiley.