KUIPERS, M. Ir. Johanna Eleanor Ferguson : Internationale vrouw in de bouw en de theosofie . Bulletin KNOB, [S. l.], v. 121, n. 2, p. 34–54, 2022. DOI: 10.48003/knob.121.2022.2.746. Disponível em: https://bulletin.knob.nl/index.php/knob/article/view/746. Acesso em: 1 jul. 2022.