APA (7th ed.) Citation

Negri, E., Tzonou, A., Beral, V., Lagiou, P., Trichopoulos, D., Parazzini, F., . . . La Vecchia, C. (1999). Hormonal therapy for menopause and ovarian cancer in a collaborative re-analysis of European studies.

Chicago Style (17th ed.) Citation

Negri, E., A. Tzonou, V. Beral, P. Lagiou, D. Trichopoulos, F. Parazzini, S. Franceschi, M. Booth, and C. La Vecchia. Hormonal Therapy for Menopause and Ovarian Cancer in a Collaborative Re-analysis of European Studies. 1999.

MLA (9th ed.) Citation

Negri, E., et al. Hormonal Therapy for Menopause and Ovarian Cancer in a Collaborative Re-analysis of European Studies. 1999.