The construct of language proficiency in bilingual education. Cummins, J. In Current Issues in Bilingual Education, pages 81–103. Georgetown University Press, Washington D.C., 1980.
bibtex   
@incollection{cummins_construct_1980,
	address = {Washington D.C.},
	title = {The construct of language proficiency in bilingual education},
	booktitle = {Current {Issues} in {Bilingual} {Education}},
	publisher = {Georgetown University Press},
	author = {Cummins, J.},
	editor = {Alatis, J. E.},
	year = {1980},
	pages = {81--103},
}

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