APA (7th ed.) Citation

American Board of Medical Specialties. (1974). Directory of medical specialists. Published for the American Board of Medical Specialities by Marquis Who's Who.

Chicago Style (17th ed.) Citation

American Board of Medical Specialties. Directory of Medical Specialists. Chicago: Published for the American Board of Medical Specialities by Marquis Who's Who, 1974.

MLA (9th ed.) Citation

American Board of Medical Specialties. Directory of Medical Specialists. Published for the American Board of Medical Specialities by Marquis Who's Who, 1974.