HANSWILLEMENKE, M. 20 Jahre Freie Waldorfschule Backnang. Backnanger Jahrbuch, [S. l.], v. 23, p. 272–274, 2015. DOI: 10.53458/bjb.v23i.9788. Disponível em: https://journals.wlb-stuttgart.de/index.php/bjb/article/view/9788. Acesso em: 18 dez. 2024.