Dwivedi, R. S. (1997). Research methods in behavioural sciences. Rajiv beri for Macmillan India Limited.
Lua i Stíl Chicago (17ú heag.)Dwivedi, R S. Research Methods in Behavioural Sciences. New Delhi: Rajiv beri for Macmillan India Limited, 1997.
Lua MLA (8ú heag.)Dwivedi, R S. Research Methods in Behavioural Sciences. Rajiv beri for Macmillan India Limited, 1997.
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