एपीए उद्धरण

(2002). Cost effectiveness in screening for Down's syndrome still unclear. BMJ.

शिकागो स्टाइल उद्धरण

Cost Effectiveness in Screening for Down's Syndrome Still Unclear. BMJ, 2002.

एमएलए उद्धरण

Cost Effectiveness in Screening for Down's Syndrome Still Unclear. BMJ, 2002.