APA
National Institute of Health, . (19). National Institute of Health bulletin. Washington, DC: Federal Security Agency, U.S. Public Health Service.
Chicago
National Institute of Health, . 19. National Institute of Health bulletin. Washington, DC: Federal Security Agency, U.S. Public Health Service.
Harvard
National Institute of Health, . (19). National Institute of Health bulletin. Washington, DC: Federal Security Agency, U.S. Public Health Service.
MLA
National Institute of Health, . National Institute of Health bulletin. Washington, DC: Federal Security Agency, U.S. Public Health Service. 19.