Autore:John Swinton
- ↑ Gemeinsame Normdatei
- ↑ 2,0 2,1 data.bnf.fr
- ↑ OpenLibrary
- ↑ 4,0 4,1 SNAC
- ↑ Faceted Application of Subject Terminology
- ↑ Catalogo della Biblioteca della Pontificia Università San Tommaso d'Aquino
- ↑ opac.vatlib.it
- ↑ 8,0 8,1 FINA Wiki
- ↑ Oxford Dictionary of National Biography
- ↑ Bibliography of the History of the Czech Lands