Jefferson, G. (1977). Library Co operation (2nd rev.ed.). Andre Deutsch.
Dyfyniad Arddull ChicagoJefferson, George. Library Co Operation. 2nd rev.ed. London: Andre Deutsch, 1977.
Dyfyniad MLAJefferson, George. Library Co Operation. 2nd rev.ed. Andre Deutsch, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.