Dyfyniad APA

Prendergast, L. S., & Williams, R. D. (1980). An empirical investigation into the determinants of travel time. Transport and Road Research Laboratory.

Dyfyniad Arddull Chicago

Prendergast, L. S., and R. D. Williams. An Empirical Investigation into the Determinants of Travel Time. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1980.

Dyfyniad MLA

Prendergast, L. S., and R. D. Williams. An Empirical Investigation into the Determinants of Travel Time. Transport and Road Research Laboratory, 1980.

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