Clearview(英语:Clearview (typeface)) Loutzenheiser, D.W. Design of Signs for the Pentagon road network. Proceedings of the Highway Research Board. 1943: 206–35
埃塞俄比亚 哥斯达黎加、萨尔瓦多、危地马拉、洪都拉斯、墨西哥、尼加拉瓜、巴拿马 减速让行 道路交通标志 Vienna Convention on RoadSigns and Signals. United Nations Publication. 1968. ISBN 978-92-1-116973-7
and 8, was constructed by the Public Works Department (JKR) in 1887. The Benta–Kuantan Road, which now forms the entire section of the Federal Route 64
Collection of Stop and Yield Signs. mycrazyhobby.com. (原始内容存档于2017-12-28) (英语). History of the Yield sign. Road Traffic Signs. (原始内容存档于2021-07-24) (英语)