Norman, W. E. (1969). The impact of computer techniques on road transport planning: A preliminary survey of the economic potential of various techniques for the organisation of road transport operations. National Computing Centre.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Norman, William Emerson. The Impact of Computer Techniques on Road Transport Planning: A Preliminary Survey of the Economic Potential of Various Techniques for the Organisation of Road Transport Operations. Manchester: National Computing Centre, 1969.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Norman, William Emerson. The Impact of Computer Techniques on Road Transport Planning: A Preliminary Survey of the Economic Potential of Various Techniques for the Organisation of Road Transport Operations. National Computing Centre, 1969.