„Code of Federal Regulations, 49 CFR 571.3 — Definitions”. govinfo. 1. 10. 2010. стр. 239. Приступљено 29. 8. 2020. „Motorcycle means a motor vehicle with motive power having a seat or saddle for the use of the rider and designed to travel on not more than three wheels in contact with the ground.”CS1 одржавање: Формат датума (веза)