Trolleybus Magazine Nos. 207, 210, 212, 214-216, National Trolleybus Association (UK). ISSN 0266-7452.
York,F W;Phillips,A R(1996).Singapore: A History of its Trams, Trolleybuses & Buses, Volume One 1880's to 1960's.Croydon, Surrey, UK:DTS Publishing.ISBN1-900515-00-8