Citação norma APA

(2004). Down's syndrome and neural tube defects are not linked. BMJ Publishing Group Ltd.

Citação norma Chicago

Down's Syndrome and Neural Tube Defects Are Not Linked. BMJ Publishing Group Ltd, 2004.

Citação norma MLA

Down's Syndrome and Neural Tube Defects Are Not Linked. BMJ Publishing Group Ltd, 2004.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.