Não informado. (2001). Annual report on stress. Acta.
Chicago (17e ed.) BronvermeldingNão informado. Annual Report on Stress. Montreal, Canada: Acta, 2001.
MLA (8e ed.) BronvermeldingNão informado. Annual Report on Stress. Acta, 2001.
Let op: Deze citaties zijn niet altijd 100% accuraat.