Não informado. (2012). The Bulletin of the Society of Cartographers. Society of Cartographers.
Chicago-referens (17:e uppl.)Não informado. The Bulletin of the Society of Cartographers. Middlesex, Inglaterra: Society of Cartographers, 2012.
MLA-referens (8:e uppl.)Não informado. The Bulletin of the Society of Cartographers. Society of Cartographers, 2012.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.