Black, T. R. (1993). Evaluating social science research: An introduction. Sape.
Cita Chicago (17th ed.)Black, Thomas R. Evaluating Social Science Research: An Introduction. London: Sape, 1993.
Cita MLA (9th ed.)Black, Thomas R. Evaluating Social Science Research: An Introduction. Sape, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.