Cita APA

Ellerington, M. C., Whitehead, M. I., & Stevenson, J. C. (1991). Hormone replacement therapy.

Citación estilo Chicago

Ellerington, M C., M I. Whitehead, y J C. Stevenson. Hormone Replacement Therapy. 1991.

Cita MLA

Ellerington, M C., M I. Whitehead, y J C. Stevenson. Hormone Replacement Therapy. 1991.