APA
O`Hara R. A., . (1991). Guide to highway law for architects, engineers, surveyors and contractors. London: E. & F. N. Spon.
Chicago
O`Hara Robert A, . 1991. Guide to highway law for architects, engineers, surveyors and contractors. London: E. & F. N. Spon.
Harvard
O`Hara R. A., . (1991). Guide to highway law for architects, engineers, surveyors and contractors. London: E. & F. N. Spon.
MLA
O`Hara Robert A, . Guide to highway law for architects, engineers, surveyors and contractors. London: E. & F. N. Spon. 1991.