Cita APA

Robinson, N., Beral, V., & Ashley, J. (1981). Trends in pelvic inflammatory disease in England and Wales.

Citación estilo Chicago

Robinson, N., V. Beral, and J. Ashley. Trends in Pelvic Inflammatory Disease in England and Wales. 1981.

Cita MLA

Robinson, N., et al. Trends in Pelvic Inflammatory Disease in England and Wales. 1981.