Dyfyniad APA

Northwestern University (Evanston, Ill.). Traffic Institute. Traffic digest. Traffic Institute, Northwestern University.

Dyfyniad Arddull Chicago

Northwestern University (Evanston, Ill.). Traffic Institute. Traffic Digest. Evanston: Traffic Institute, Northwestern University.

Dyfyniad MLA

Northwestern University (Evanston, Ill.). Traffic Institute. Traffic Digest. Traffic Institute, Northwestern University.

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