Gopalakrishna, D. (2010). Electronic marketing in 21st century (Rev. ed.). Himalaya Pub. House.
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Chicago-čujuhus (17. p.)
Gopalakrishna, D. Electronic Marketing in 21st Century. Rev. ed. Mumbai: Himalaya Pub. House, 2010.
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MLA-čujuhus (9. p.)
Gopalakrishna, D. Electronic Marketing in 21st Century. Rev. ed. Himalaya Pub. House, 2010.
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