"Beginners Please! ... the Ticketer System". Journal of the Transport Ticket Society (638). Transport Ticket Society: 100. March 2017. ISSN0144-347X.
"Beginners Please! ... the Ticketer System". Journal of the Transport Ticket Society (638). Transport Ticket Society: 101. March 2017. ISSN0144-347X.
"Beginners Please! ... the Ticketer System". Journal of the Transport Ticket Society (638). Transport Ticket Society: 100–101. March 2017. ISSN0144-347X.
"Beginners Please! ... the Ticketer System". Journal of the Transport Ticket Society (638). Transport Ticket Society: 103. March 2017. ISSN0144-347X.
"Beginners Please! ... the Ticketer System". Journal of the Transport Ticket Society (638). Transport Ticket Society: 102. March 2017. ISSN0144-347X.
"Oxford Bus Company convert to Ticketer". Journal of the Transport Ticket Society (639). Transport Ticket Society: 134–135. April 2017. ISSN0144-347X.
"UK, Irish Road, PTE, Rapid Transit News". Journal of the Transport Ticket Society (641). Transport Ticket Society: 198. June 2017. ISSN0144-347X.
"UK, Irish Road, PTE, Rapid Transit News". Journal of the Transport Ticket Society (644). Transport Ticket Society: 309. September 2017. ISSN0144-347X.