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.