Sjoberg, G. (1997). A methodology for social research. Rawat.
Cita Chicago (17th ed.)Sjoberg, Gideon. A Methodology for Social Research. Jaipur: Rawat, 1997.
Cita MLA (9th ed.)Sjoberg, Gideon. A Methodology for Social Research. Rawat, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.