APA-čujuhus (7. p.)

ETHERTON, A. (1977). Contact 3: A secondary english course.-- Ed.Revised. Longman.

Chicago-čujuhus (17. p.)

ETHERTON, A.R.B. Contact 3: A Secondary English Course.-- Ed.Revised. Kuala Lumpur: Longman, 1977.

MLA-čujuhus (9. p.)

ETHERTON, A.R.B. Contact 3: A Secondary English Course.-- Ed.Revised. Longman, 1977.

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