Gupta, S. (2020). Digital Marketing (2nd.). McgrawHill.
Lua i Stíl Chicago (17ú heag.)Gupta, Seema. Digital Marketing. 2nd. Chennai: McgrawHill, 2020.
Lua MLA (9ú heag.)Gupta, Seema. Digital Marketing. 2nd. McgrawHill, 2020.
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