APA (7th ed.) Citation

Center of Military History, United States. Public Health Service. Office of the Surgeon General, & Allen, A. M. Internal medicine in Vietnam.

Chicago Style (17th ed.) Citation

Center of Military History, United States. Public Health Service. Office of the Surgeon General, and Alfred M. Allen. Internal Medicine in Vietnam.

MLA (9th ed.) Citation

Center of Military History, et al. Internal Medicine in Vietnam.