O'Hara, R. A. (1991). Guide to highway law for architects, engineers, surveyors, and contractors. E & FN Spon.
Chicago-viite (17. p.)O'Hara, Robert A. Guide to Highway Law for Architects, Engineers, Surveyors, and Contractors. London, New York: E & FN Spon, 1991.
MLA-viite (9. p.)O'Hara, Robert A. Guide to Highway Law for Architects, Engineers, Surveyors, and Contractors. E & FN Spon, 1991.
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