Hardy, M. A. (1993). Regression With Dummy Variables. Sage.
Cita Chicago (17th ed.)Hardy, Melissa A. Regression With Dummy Variables. New Delhi.: Sage, 1993.
Cita MLA (9th ed.)Hardy, Melissa A. Regression With Dummy Variables. Sage, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.