Cita APA (7th ed.)

DOEACC Society. (2001). Quanbook `O` level: Model questions Vol II PC Software. BPB.

Cita Chicago (17th ed.)

DOEACC Society. Quanbook `O` Level: Model Questions Vol II PC Software. New Delhi: BPB, 2001.

Cita MLA (9th ed.)

DOEACC Society. Quanbook `O` Level: Model Questions Vol II PC Software. BPB, 2001.