The italian law permits to cite a work protected by copyright for "use of criticism or discussion within the limits justified by this aim, provided that it doesn't compete with the commercial use of the work; if the aim is teaching or scientific research it must be for explanatory use and non-commercial aim" (law n. 633 year 1941, art. 70). We have to mention author, title, publisher and translator. If the article is connected with an article on Wikipedia, the "use of criticism or discussion" is assured, but if the articles doesn't refer to a quote, that quote maybe exceeds the "justified limits". The "explanatory use and non-commercial aim" is sure. Generally there isn't any competition with the commercial use (that is the most important condition), but e.g. a collection of quotes by comic shows (e.g. Simpsons) may be considered in competition with published collections, if there is one. Daniele Luttazzi, an italian comic actor, asked us to limit the number of quotes by his works (and deleted by himself the exceeding ones). So, our problem is the mention of author etc. We have many quotes without any source (added by inexperienced users, or years ago), but we don't delete them. We prefer to signal all unsourced quotes and to search the sources personally (this is the work done by Dread, the most active admin, now inactive) or to encourage anonymous users to add sources (this is my work). Anonymous users add sources even to old quotes daily. However, here in Italy there are quotes without any reference everywhere: books (collection for sale too), newspapers, magazine... And nobody complains about that. We are certainly more serious and respectful of the copyright law than the best part of the people. This (http://it.wikiquote.org/wiki/Template:Da_controllare) is the template we use for unsourced quotes, this (http://it.wikiquote.org/wiki/Voltaire#Senza_fonte) is an unsourced quotes section and this (http://it.wikiquote.org/wiki/Charles_Caleb_Colton) is an article without a dedicated unsourced quotes section. Nemo