APA-čujuhus (7. p.)

Bittinger, J. (2000). Happy times: Student's book 6. MacMillan.

Chicago-čujuhus (17. p.)

Bittinger, Judie. Happy Times: Student's Book 6. Oxford: MacMillan, 2000.

MLA-čujuhus (9. p.)

Bittinger, Judie. Happy Times: Student's Book 6. MacMillan, 2000.

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