Parrish, H. (1967). Pratt and Mackenzie's Law of highways - supplement (21st ed.). Butterworth.
Chicago Edition CitationParrish, Harold. Pratt and Mackenzie's Law of Highways - Supplement. 21st ed. London: Butterworth, 1967.
Cita MLAParrish, Harold. Pratt and Mackenzie's Law of Highways - Supplement. 21st ed. Butterworth, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.