The Drouin collection is a collection of church records, quite extensive. I know that places like Ancestry.com have access to it, as when you look at some of the GEDCOM imports that started with Ancestry, lots of records are quoted as from Drouin collection. Drouin Institute uses the LaFrance database, and the photographs of the original records are tied into the database, except for the odd one that is missing or illegible. ALL my data, unless otherwise noted, comes from there. The only numbering system is that of the database, which is subject to change. Most of my profiles are my own original research through use of that database. I am quite painstaking in my research, and resort to other sources only when something is bogged down or it leads outside of Quebec. PRDH is another good source that some folks use, and it too is subscription based. For that matter, so is Ancestry. The only decent free source for the older profiles is Fichier Origine, but that is quite limited, dealing only with those who immigrated to this country. Lots of people use NosOrigines, but that is not an original source, but rather a collation of other sources, in which I have found multiple errors, so I trust it minimally.
My question remains though, do I really need to put in a reference to each individual fact in a profile? When I list all the children of a couple, birth, death, marriage, on top of the parents' own data, this can get outrageously lengthy.