Singh, K. (2007). Quantitative social research methods. Sage.
Cita Chicago Style (17a ed.)Singh, Kultar. Quantitative Social Research Methods. New Delhi: Sage, 2007.
Cita MLA (9a ed.)Singh, Kultar. Quantitative Social Research Methods. Sage, 2007.
Precaución: Estas citas no son 100% exactas.