HINKLER PUBLISHER. (2005). MINDWORK BRAIN TRAINING NUMERIC PUZZLES. HINKLER.
Chicago-čujuhus (17. p.)HINKLER PUBLISHER. MINDWORK BRAIN TRAINING NUMERIC PUZZLES. AUSTRALIA: HINKLER, 2005.
MLA-čujuhus (9. p.)HINKLER PUBLISHER. MINDWORK BRAIN TRAINING NUMERIC PUZZLES. HINKLER, 2005.
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