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