DeVellis, R. F. (1991). Scale development: Theory and applications. Sage.
Chicago (17e ed.) BronvermeldingDeVellis, Robert F. Scale Development: Theory and Applications. Newbury Park, Calif.: Sage, 1991.
MLA (8e ed.) BronvermeldingDeVellis, Robert F. Scale Development: Theory and Applications. Sage, 1991.
Let op: Deze citaties zijn niet altijd 100% accuraat.