Cita APA

Armstrong, C. P., & Whitelaw, S. J. (1989). Death from unsuspected colorectal cancer. Royal College of Surgeons of England.

Citación estilo Chicago

Armstrong, C. P., y S. J. Whitelaw. Death From Unsuspected Colorectal Cancer. Royal College of Surgeons of England, 1989.

Cita MLA

Armstrong, C. P., y S. J. Whitelaw. Death From Unsuspected Colorectal Cancer. Royal College of Surgeons of England, 1989.