APA
Cox J., Cox J., . (2010). 2007 microsoft office system step by step. New Delhi: PHI learning pvt ltd.
Chicago
Cox Joyce, Cox Joyce, . 2010. 2007 microsoft office system step by step. New Delhi: PHI learning pvt ltd.
Harvard
Cox J., Cox J., . (2010). 2007 microsoft office system step by step. New Delhi: PHI learning pvt ltd.
MLA
Cox Joyce, Cox Joyce, . 2007 microsoft office system step by step. New Delhi: PHI learning pvt ltd. 2010.