PETSCHE, Johanna J.M. Gurdjieffian Overtones in Leon MacLaren’s School of Economic Science. International Journal for the Study of New Religions, [S. l.], v. 6, n. 2, p. 197–217, 2016. DOI: 10.1558/ijsnr.v6i2.28443. Disponível em: https://journal.equinoxpub.com/IJSNR/article/view/12102.. Acesso em: 23 may. 2024.