Dyfyniad APA

Lancaster, W. . F. (1979). Information retrieval systems: Characteristics,testing and evalution (2nd ed.). Johnwiley&sons.

Dyfyniad Arddull Chicago

Lancaster, Wilfrid F. Information Retrieval Systems: Characteristics,testing and Evalution. 2nd ed. New York: Johnwiley&sons, 1979.

Dyfyniad MLA

Lancaster, Wilfrid F. Information Retrieval Systems: Characteristics,testing and Evalution. 2nd ed. Johnwiley&sons, 1979.

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