"Illud solum votum debere dici solemne . . . quod solemnizatum fuerit per suceptionem S. Ordinis aut per professionem expressam vel tacitam factam alicui de religionibus per Sedem Apostolicam approbatis" (C. unic. de voto, tit. 15, lib. III in 6, quoted in Celestine Anthony Freriks, Religious Congregations in Their External Relations, p. 17).
"Ordinations of U.S. Catholic Bishops, 1790-1989". (Proceedings of The) National Conference of Catholic Bishops, U.S. Catholic Conference (N. 323-X). Washington, D.C.: 277 1990. OCLC22690473.