Dawson, R. F. F., & Everall, P. F. (1972). The value of motorists' time: A study in Italy. Environment Section, Transportation Division, Transportation and Road Research Laboratory.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Dawson, R. F. F., و P. F. Everall. The Value of Motorists' Time: A Study in Italy. Crowthorne, Berkshire: Environment Section, Transportation Division, Transportation and Road Research Laboratory, 1972.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Dawson, R. F. F., و P. F. Everall. The Value of Motorists' Time: A Study in Italy. Environment Section, Transportation Division, Transportation and Road Research Laboratory, 1972.
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