Alexander, L. G. (1979). Mainline beginners B: Teacher's book. Longman.
Chicago-čujuhus (17. p.)Alexander, Louis George. Mainline Beginners B: Teacher's Book. Londres: Longman, 1979.
MLA-čujuhus (9. p.)Alexander, Louis George. Mainline Beginners B: Teacher's Book. Longman, 1979.
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