Earl W Stevick. (1955). Helping people learning English: A manual for teachers of English as a second language. New York: Abingdon.
শিকাগো স্টাইলে সাইটেশনEarl W Stevick. Helping People Learning English: A Manual for Teachers of English As a Second Language. New York: Abingdon, 1955.
এমএলএ সাইটেশনEarl W Stevick. Helping People Learning English: A Manual for Teachers of English As a Second Language. New York: Abingdon, 1955.
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