Britain), T. a. R. R. L. (. (19). Dial-a-bus in Harlow [kasetvideo]. Crowthorne, Eng. : TRRL Film Library.
Chicago-viite (17. p.)Britain), Transport and Road Research Laboratory (Great. Dial-a-bus in Harlow [kasetvideo]. Crowthorne, Eng. : TRRL Film Library, 19.
MLA-viite (9. p.)Britain), Transport and Road Research Laboratory (Great. Dial-a-bus in Harlow [kasetvideo]. Crowthorne, Eng. : TRRL Film Library, 19.
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