Sekaran, U. (2011). Research Methods for Business: A Skill Building Approach (5th.). Wiley India Pvt. Ltd.
Lua i Stíl Chicago (17ú heag.)Sekaran, Uma. Research Methods for Business: A Skill Building Approach. 5th. New Delhi: Wiley India Pvt. Ltd, 2011.
Lua MLA (9ú heag.)Sekaran, Uma. Research Methods for Business: A Skill Building Approach. 5th. Wiley India Pvt. Ltd, 2011.
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