help: wget usage

Hello, I need to download some files from URL gapil.truelite.it/sources/ I'm trying to use wget but I am not able to find the right options for download the enitre directory (.c and .h files) I made several attempts like wget gapil.truelite.it/sources/*.c or wget -A.c gapil.truelite.it/sources/ (to download only .c files) but It seems non work. There's someone able to help me. Sorry but I am very novice with linux. W.

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