APA-čujuhus (7. p.)

Bell, J. (2004). Teaching multilevel classes in ESL. Pippin Pub..

Chicago-čujuhus (17. p.)

Bell, Jill. Teaching Multilevel Classes in ESL. Toronto: Pippin Pub., 2004.

MLA-čujuhus (9. p.)

Bell, Jill. Teaching Multilevel Classes in ESL. Pippin Pub., 2004.

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