Dyfyniad APA

Blackburn, R. R., & Gilbert, D. T. (1995). Photographic enforcement of traffic laws. National Academy Press.

Dyfyniad Arddull Chicago

Blackburn, R. R., and Daniel T. Gilbert. Photographic Enforcement of Traffic Laws. Washington, D.C: National Academy Press, 1995.

Dyfyniad MLA

Blackburn, R. R., and Daniel T. Gilbert. Photographic Enforcement of Traffic Laws. National Academy Press, 1995.

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