Harold B Allen. (1965). Teaching English as a second language: A book of readings. New York: McGraw-Hill.
Chicago-tyylinen lähdeviittausHarold B Allen. Teaching English As a Second Language: A Book of Readings. New York: McGraw-Hill, 1965.
MLA-viiteHarold B Allen. Teaching English As a Second Language: A Book of Readings. New York: McGraw-Hill, 1965.
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