K.C. Ng และ K.J. Roberts and Y.K. Ho. (2016) Rock Caverns Hong Kong's Hidden Land. <i>The Geotechnical Engineering Journal of the SEAGS & AGSSEA</i>, <i>47</i>(3), pp 11-18.K.C. Ng และ K.J. Roberts and Y.K. Ho. "Rock Caverns Hong Kong's Hidden Land". The Geotechnical Engineering Journal of the SEAGS & AGSSEA 47 (2016):pp 11-18.K.C. Ng และ K.J. Roberts and Y.K. Ho. Rock Caverns Hong Kong's Hidden Land. Southeast Asian Geotechnical Society:ม.ป.ท. 2016.