APA-viite (7. p.)
Das Gupta, V. (1998). Marketing mantra: The real story of direct marketing in India. Prentice-Hall of India.
Chicago-viite (17. p.)
Das Gupta, Vaswar. Marketing Mantra: The Real Story of Direct Marketing in India. New Delhi: Prentice-Hall of India, 1998.
MLA-viite (9. p.)
Das Gupta, Vaswar. Marketing Mantra: The Real Story of Direct Marketing in India. Prentice-Hall of India, 1998.
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