Citação norma APA

Koren, G. (1997). Antihistamines are safe during the first trimester. College of Family Physicians of Canada.

Citação norma Chicago

Koren, G. Antihistamines Are Safe During the First Trimester. College of Family Physicians of Canada, 1997.

Citação norma MLA

Koren, G. Antihistamines Are Safe During the First Trimester. College of Family Physicians of Canada, 1997.

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