APA (7th ed.) Zitazioa
(1967). Vital Statistics of the United States. U.S. Dep. of Health, Education and Welfare.
Chicago Style (17th ed.) Zitazioa
Vital Statistics of the United States. Washington: U.S. Dep. of Health, Education and Welfare, 1967.
MLA (9th ed.) Zitazioa
Vital Statistics of the United States. U.S. Dep. of Health, Education and Welfare, 1967.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.