Dyfyniad APA

Lancaster, F. W. (1979). Information Retreival Systems. Wiley Eastern.

Dyfyniad Arddull Chicago

Lancaster, F Wilfred. Information Retreival Systems. New york: Wiley Eastern, 1979.

Dyfyniad MLA

Lancaster, F Wilfred. Information Retreival Systems. Wiley Eastern, 1979.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.