APA (7th ed.) Citation

Bosetti, C., Negri, E., Franceschi, S., Trichopoulos, D., Beral, V., & La Vecchia, C. (2001). Relationship between postmenopausal hormone replacement therapy and ovarian cancer.

Chicago Style (17th ed.) Citation

Bosetti, C., E. Negri, S. Franceschi, D. Trichopoulos, V. Beral, and C. La Vecchia. Relationship Between Postmenopausal Hormone Replacement Therapy and Ovarian Cancer. 2001.

MLA (9th ed.) Citation

Bosetti, C., et al. Relationship Between Postmenopausal Hormone Replacement Therapy and Ovarian Cancer. 2001.