APA-čujuhus (7. p.)

Gopala Krishna, C., & Ramakrishnan, L. (2009). Business communication. Himalaya Pub. House.

Chicago-čujuhus (17. p.)

Gopala Krishna, C., juo Lalitha Ramakrishnan. Business Communication. Mumbai: Himalaya Pub. House, 2009.

MLA-čujuhus (9. p.)

Gopala Krishna, C., juo Lalitha Ramakrishnan. Business Communication. Himalaya Pub. House, 2009.

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