(1962). Prenatal care. U.S. Department of Health Education, and Welfare.
Chicago Style aipamenaPrenatal Care. Washington, D.C: U.S. Department of Health Education, and Welfare, 1962.
MLA aipamenaPrenatal Care. U.S. Department of Health Education, and Welfare, 1962.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.