Não informado. (2019). Newsletter of the International Test Commission. International Test Commission.
Chicago (17e ed.) BronvermeldingNão informado. Newsletter of the International Test Commission. [s.l.]: International Test Commission, 2019.
MLA (8e ed.) BronvermeldingNão informado. Newsletter of the International Test Commission. International Test Commission, 2019.
Let op: Deze citaties zijn niet altijd 100% accuraat.