WILLÉN, Marcus. Klaus Bettag & Jan A. M. Snoek, Quellen der Eckleff’schen Andreas-Akten, Frederik 21 (Flensburg: Freimaurerischen Forschungsvereinung Frederik 2012). 424 s. 1700-tal: Nordic Journal for Eighteenth-Century Studies, Tromsø, Norway, v. 10, p. 209–210, 2013. DOI: 10.7557/4.2643. Disponível em: https://septentrio.uit.no/index.php/1700/article/view/2643. Acesso em: 18 apr. 2026.