Cardijn, un homme, un mouvement, 1983 t.p. (Cardijn) p. 9 (Jozef Cardijn)
LC manual auth. cd. (hdg.: Cardyn, Léon Joseph Marie, 1882-1967; usage: Joseph Cardijn, J. Cardijn, J. Cardyn, Jos. Cardyn)
Wikipedia website, viewed on 13 November 2017 (Joseph Leo Cardijn (13 November 1882 – 24 July 1967) was a Belgian cardinal of the Roman Catholic Church and was the founder of the Young Christian Workers) https://en.wikipedia.org/wiki/Joseph_Cardijn