Cita APA (7th ed.)
Singh, Y. K. (2005). Research methodology (ed.). A. P. H..
Cita Chicago (17th ed.)
Singh, Y. Kumar. Research Methodology. ed. New Delhi: A. P. H., 2005.
Cita MLA (9th ed.)
Singh, Y. Kumar. Research Methodology. ed. A. P. H., 2005.
Atenció: Aquestes cites poden no estar 100% correctes.