Symons, I. F., Clayton, C. R. I., & Darley, P. (1989). Earth pressures against an experimental retaining wall backfilled with heavy clay. Ground Engineering Division, Sturctures Group, Transport and Road Research Laboratory.
Chicago Style (17th ed.) CitationSymons, I. F., C. R. I. Clayton, and P. Darley. Earth Pressures Against an Experimental Retaining Wall Backfilled with Heavy Clay. Crowthorne, Berkshire: Ground Engineering Division, Sturctures Group, Transport and Road Research Laboratory, 1989.
MLA (9th ed.) CitationSymons, I. F., et al. Earth Pressures Against an Experimental Retaining Wall Backfilled with Heavy Clay. Ground Engineering Division, Sturctures Group, Transport and Road Research Laboratory, 1989.
Warning: These citations may not always be 100% accurate.