Cita APA (7th ed.)

DeVellis, R. F. (1991). Scale development: Theory and applications. Sage.

Cita Chicago (17th ed.)

DeVellis, Robert F. Scale Development: Theory and Applications. Newbury Park, Calif.: Sage, 1991.

Cita MLA (8th ed.)

DeVellis, Robert F. Scale Development: Theory and Applications. Sage, 1991.