LEWIS-BECK MICHAEL S. (1993). EXPERIMENTAL DESIGN AND METHODS. SAGE PUBLICATIONS.
Cita Chicago (17th ed.)LEWIS-BECK MICHAEL S. EXPERIMENTAL DESIGN AND METHODS. LONDON: SAGE PUBLICATIONS, 1993.
Cita MLA (9th ed.)LEWIS-BECK MICHAEL S. EXPERIMENTAL DESIGN AND METHODS. SAGE PUBLICATIONS, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.