Lockhart, P. (2012). Measurement. Harvard University Press.
Dyfyniad Arddull ChicagoLockhart, Paul. Measurement. Cambridge, Mass.: Harvard University Press, 2012.
Dyfyniad MLALockhart, Paul. Measurement. Harvard University Press, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.