Cita APA

(2000). Screening for Down's syndrome by maternal age and routine ultrasonography is effective. British Medical Journal.

Chicago Style Citation

Screening for Down's Syndrome By Maternal Age and Routine Ultrasonography Is Effective. British Medical Journal, 2000.

Cita MLA

Screening for Down's Syndrome By Maternal Age and Routine Ultrasonography Is Effective. British Medical Journal, 2000.

Atenció: Aquestes cites poden no estar 100% correctes.