1. Lectures on the duties and qualifications of a physician;Gregory,1772
2. Medical ethics, or a code of institutes and precepts adapted to the professional conduct of physicians and surgeons;Percival,1803
3. LB McCullough, John Gregory and the invention of professional medical ethics and the profession of medicine, Kluwer Academic, Dordrecht (In press).
4. Ethics in obstetrics and gynecology;McCullough,1994