Paul, E. (1992). Summated rating scale construction. Sage.
Dyfyniad Arddull ChicagoPaul, E.Spector. Summated Rating Scale Construction. Newbary park: Sage, 1992.
Dyfyniad MLAPaul, E.Spector. Summated Rating Scale Construction. Sage, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.