Reference:
Gibaud-Wallston, J. and Wandersman, L.P. (1978) ‘Parenting sense of competence scale’, in Touliatos, J., Perlmutter, B.R., and Holden, G.W. (eds.) Handbook of Family Measurement Techniques, 3, 315; Abstract: 2, 166–167. Thousand Oaks: Sage.