Every factual claim in this guide should be traceable to something you can go and read for yourself. This page is the list of what the guide is built on.
The list below is not typed out here. It is generated from the guide's citation records, which are the same records the individual identity pages cite. That means a source corrected once is corrected everywhere it appears, and a link that goes dead is fixed in one place. Each identity page and each comparison page also shows the sources for that page specifically, so this page is the whole set rather than the only place sources appear.
Sources are grouped by kind: medical, legal and policy, academic and research, statistics and surveys, community and reference, and flag and colour reference. The tier badge is our own reading of how much weight a source can carry, from tier 1 (peer-reviewed research, primary legislation, official national statistics) to tier 5 (community wikis and individual posts). A tier 5 source is not a bad source. It is evidence of how a community describes itself, which is often the only evidence there is for a term's origin, and it is not evidence of clinical or legal fact. Where an entry is marked superseded, it is cited as a document of its period rather than as current guidance.
Belgian and European sources are tracked deliberately. This guide is written from Ghent, and most English-language LGBTQIA+ reference material describes the United States. Where a figure is American, the entry says so.
Legal and statistical sources are re-checked each May, when ILGA-Europe and TGEU publish their annual indexes. Last reviewed 20 August 2026. If something here is wrong, out of date or missing, tell us and we will fix it.