L-Istzdhu Soċjali - Sillabu gat-Tielet u r-Raba Klassi Sekondarja (Ġenerali u Option) - (:unkn) unknown (My University, 2016)
https://opac.lbs-braunschweig.gbv.de/DB=6/CLK?IKT=12&TRM=1793484309