Não informado. (1968). Language Teaching Abstracts. Cambridge University Press.
Chicago (17e ed.) BronvermeldingNão informado. Language Teaching Abstracts. London: Cambridge University Press, 1968.
MLA (8e ed.) BronvermeldingNão informado. Language Teaching Abstracts. Cambridge University Press, 1968.
Let op: Deze citaties zijn niet altijd 100% accuraat.