Alexander, L. G. (1967). Question and answer: Graded oral comprehension exercises (1a. ed.). Longman.
Chicago Style (17. basım) AtıfAlexander, Louis George. Question and Answer: Graded Oral Comprehension Exercises. 1a. ed. Londres: Longman, 1967.
MLA (9th ed.) AtıfAlexander, Louis George. Question and Answer: Graded Oral Comprehension Exercises. 1a. ed. Longman, 1967.
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