International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground & Viggiani, G. e. (201). Geotechnical aspects of underground construction in soft ground: Proceedings of the 7th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, Roma, Italy, 17-19 May, 2011. Leiden, Netherlands : CRC Press/Balkema.
Παραπομπή σε μορφή Chicago (17η εκδ.)International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground και Giulia editor Viggiani. Geotechnical Aspects of Underground Construction in Soft Ground: Proceedings of the 7th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, Roma, Italy, 17-19 May, 2011. Leiden, Netherlands : CRC Press/Balkema, 201.
Παραπομπή σε μορφή MLA (9th εκδ.)International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground και Giulia editor Viggiani. Geotechnical Aspects of Underground Construction in Soft Ground: Proceedings of the 7th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, Roma, Italy, 17-19 May, 2011. Leiden, Netherlands : CRC Press/Balkema, 201.