Gopala Krishna, C., & Ramakrishnan, L. (2009). Business communication. Himalaya Pub. House.
Tohutoru Kātū Chicago (17th ed.)Gopala Krishna, C., me Lalitha Ramakrishnan. Business Communication. Mumbai: Himalaya Pub. House, 2009.
Tohutoro MLA (9th ed.)Gopala Krishna, C., me Lalitha Ramakrishnan. Business Communication. Himalaya Pub. House, 2009.
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