DeVellis, R. F. Scale development: Theory and applications (2a ed.).
Cita Chicago (17th ed.)DeVellis, Robert F. Scale Development: Theory and Applications. 2a ed.
Cita MLA (8th ed.)DeVellis, Robert F. Scale Development: Theory and Applications. 2a ed.
Atenció: Aquestes cites poden no estar 100% correctes.