توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Wigan, M. R. (1979). Indicators for the analysis, monitoring and planning of freight policies and activities. Australian Road Research Board.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Wigan, M. R. Indicators for the Analysis, Monitoring and Planning of Freight Policies and Activities. Vermont South, Vic.: Australian Road Research Board, 1979.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Wigan, M. R. Indicators for the Analysis, Monitoring and Planning of Freight Policies and Activities. Australian Road Research Board, 1979.