Dyfyniad APA

Lancaster, F. W. (1979). Information retrieval systems: Characteristics, testing and evaluation (2nd ed.). John Wiley & Sons.

Dyfyniad Arddull Chicago

Lancaster, F. Wilfrid. Information Retrieval Systems: Characteristics, Testing and Evaluation. 2nd ed. New York: John Wiley & Sons, 1979.

Dyfyniad MLA

Lancaster, F. Wilfrid. Information Retrieval Systems: Characteristics, Testing and Evaluation. 2nd ed. John Wiley & Sons, 1979.

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