Edinburgh. University. Dept. of Urban Design and Regional Planning. Planning Research Unit & Scotland. Scottish Development Dept. (1973). Threshold analysis manual. H. M. Stationery Off.
Cita Chicago (17th ed.)Edinburgh. University. Dept. of Urban Design and Regional Planning. Planning Research Unit i Scotland. Scottish Development Dept. Threshold Analysis Manual. Edinburgh: H. M. Stationery Off, 1973.
Cita MLA (9th ed.)Edinburgh. University. Dept. of Urban Design and Regional Planning. Planning Research Unit i Scotland. Scottish Development Dept. Threshold Analysis Manual. H. M. Stationery Off, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.