DOEACC Society. (2001). Quanbook `O` level: Model questions Vol II PC Software. BPB.
Chicago-čujuhus (17. p.)DOEACC Society. Quanbook `O` Level: Model Questions Vol II PC Software. New Delhi: BPB, 2001.
MLA-čujuhus (9. p.)DOEACC Society. Quanbook `O` Level: Model Questions Vol II PC Software. BPB, 2001.
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