Pennsylvania State University. Applied Research Laboratory & Lawther, J. M. (1980). Noise barrier acoustical parameters: Experimental results : an NCHRP staff digest of the essential findings from the final report on NCHRP Project 3-26 .. Transportation Research Board, National Research Council.
Chicago Style (17. basım) AtıfPennsylvania State University. Applied Research Laboratory ve J. M. Lawther. Noise Barrier Acoustical Parameters: Experimental Results : An NCHRP Staff Digest of the Essential Findings from the Final Report on NCHRP Project 3-26 .. Washington, D. C: Transportation Research Board, National Research Council, 1980.
MLA (9th ed.) AtıfPennsylvania State University. Applied Research Laboratory ve J. M. Lawther. Noise Barrier Acoustical Parameters: Experimental Results : An NCHRP Staff Digest of the Essential Findings from the Final Report on NCHRP Project 3-26 .. Transportation Research Board, National Research Council, 1980.