Krishnan D. S. Cengage Foundation Series General Mental Ability. Cengage Learing India Pvt. Ltd.
Cita Chicago (17th ed.)Krishnan D. S. Cengage Foundation Series General Mental Ability. Delhi: Cengage Learing India Pvt. Ltd.
Cita MLA (9th ed.)Krishnan D. S. Cengage Foundation Series General Mental Ability. Cengage Learing India Pvt. Ltd.
Atenció: Aquestes cites poden no estar 100% correctes.